23481 has 6 divisors (see below), whose sum is σ = 33930. Its totient is φ = 15648.

The previous prime is 23473. The next prime is 23497. The reversal of 23481 is 18432.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19881 + 3600 = 141^2 + 60^2 .

It is not a de Polignac number, because 23481 - 2³ = 23473 is a prime.

It is a super-2 number, since 2×23481² = 1102714722, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 23481.

It is not an unprimeable number, because it can be changed into a prime (23431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1296 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (5655).

2²³⁴⁸¹ is an apocalyptic number.

It is an amenable number.

23481 is a deficient number, since it is larger than the sum of its proper divisors (10449).

23481 is a wasteful number, since it uses less digits than its factorization.

23481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615 (or 2612 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 23481 is about 153.2351134695. The cubic root of 23481 is about 28.6355500353.

The spelling of 23481 in words is "twenty-three thousand, four hundred eighty-one".