55911312 has 30 divisors (see below), whose sum is σ = 156474422. Its totient is φ = 18637056.

The previous prime is 55911307. The next prime is 55911337. The reversal of 55911312 is 21311955.

It can be written as a sum of positive squares in only one way, i.e., 55890576 + 20736 = 7476^2 + 144^2 .

It is a super-2 number, since 2×55911312² = 6252149619122688, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193993 + ... + 194280.

Almost surely, 2^55911312 is an apocalyptic number.

It is an amenable number.

55911312 is an abundant number, since it is smaller than the sum of its proper divisors (100563110).

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

55911312 is a wasteful number, since it uses less digits than its factorization.

55911312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388287 (or 388278 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 55911312 is about 7477.3867092722. The cubic root of 55911312 is about 382.3841607440.

It can be divided in two parts, 5591 and 1312, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 55911312 in words is "fifty-five million, nine hundred eleven thousand, three hundred twelve".