55397312 has 28 divisors (see below), whose sum is σ = 115717320. Its totient is φ = 26240256.

The previous prime is 55397311. The next prime is 55397347. The reversal of 55397312 is 21379355.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55397311) 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, 21563 + ... + 23994.

Almost surely, 2^55397312 is an apocalyptic number.

It is an amenable number.

55397312 is an abundant number, since it is smaller than the sum of its proper divisors (60320008).

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

55397312 is a wasteful number, since it uses less digits than its factorization.

55397312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45588 (or 45578 counting only the distinct ones).

The product of its digits is 28350, while the sum is 35.

The square root of 55397312 is about 7442.9370546848. The cubic root of 55397312 is about 381.2087823576.

The spelling of 55397312 in words is "fifty-five million, three hundred ninety-seven thousand, three hundred twelve".