312111420 has 24 divisors (see below), whose sum is σ = 873912144. Its totient is φ = 83229696.

The previous prime is 312111419. The next prime is 312111451. The reversal of 312111420 is 24111213.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 312111420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600869 + ... + 2600988.

It is an arithmetic number, because the mean of its divisors is an integer number (36413006).

Almost surely, 2^312111420 is an apocalyptic number.

312111420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

312111420 is an abundant number, since it is smaller than the sum of its proper divisors (561800724).

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

312111420 is a wasteful number, since it uses less digits than its factorization.

312111420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201869 (or 5201867 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 312111420 is about 17666.6754088029. The cubic root of 312111420 is about 678.3230159125.

Adding to 312111420 its reverse (24111213), we get a palindrome (336222633).

It can be divided in two parts, 3121 and 11420, that added together give a palindrome (14541).

The spelling of 312111420 in words is "three hundred twelve million, one hundred eleven thousand, four hundred twenty".