23015120 has 20 divisors (see below), whose sum is σ = 53510340. Its totient is φ = 9206016.

The previous prime is 23015119. The next prime is 23015123. The reversal of 23015120 is 2151032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16192576 + 6822544 = 4024^2 + 2612^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×23015120² = 1059391497228800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23015095 and 23015104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23015123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143765 + ... + 143924.

It is an arithmetic number, because the mean of its divisors is an integer number (2675517).

Almost surely, 2^23015120 is an apocalyptic number.

23015120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23015120 is an abundant number, since it is smaller than the sum of its proper divisors (30495220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23015120 is a wasteful number, since it uses less digits than its factorization.

23015120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287702 (or 287696 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 23015120 is about 4797.4076332953. The cubic root of 23015120 is about 284.4490021152.

Adding to 23015120 its reverse (2151032), we get a palindrome (25166152).

The spelling of 23015120 in words is "twenty-three million, fifteen thousand, one hundred twenty".