55813172 has 12 divisors (see below), whose sum is σ = 99011556. Its totient is φ = 27524160.

The previous prime is 55813169. The next prime is 55813181. The reversal of 55813172 is 27131855.

It can be written as a sum of positive squares in 2 ways, for example, as 41036836 + 14776336 = 6406^2 + 3844^2 .

It is a super-2 number, since 2×55813172² = 6230220337403168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95279 + ... + 95862.

It is an arithmetic number, because the mean of its divisors is an integer number (8250963).

Almost surely, 2^55813172 is an apocalyptic number.

It is an amenable number.

55813172 is a deficient number, since it is larger than the sum of its proper divisors (43198384).

55813172 is a wasteful number, since it uses less digits than its factorization.

55813172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191218 (or 191216 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 55813172 is about 7470.8213738517. The cubic root of 55813172 is about 382.1602993074.

The spelling of 55813172 in words is "fifty-five million, eight hundred thirteen thousand, one hundred seventy-two".