55157140 has 24 divisors (see below), whose sum is σ = 115971912. Its totient is φ = 22035840.

The previous prime is 55157117. The next prime is 55157189. The reversal of 55157140 is 4175155.

It can be written as a sum of positive squares in 4 ways, for example, as 11664 + 55145476 = 108^2 + 7426^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55157099 and 55157108.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 26622 + ... + 28618.

It is an arithmetic number, because the mean of its divisors is an integer number (4832163).

Almost surely, 2^55157140 is an apocalyptic number.

It is an amenable number.

55157140 is an abundant number, since it is smaller than the sum of its proper divisors (60814772).

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

55157140 is a wasteful number, since it uses less digits than its factorization.

55157140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3387 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 55157140 is about 7426.7853072510. The cubic root of 55157140 is about 380.6570810596.

The spelling of 55157140 in words is "fifty-five million, one hundred fifty-seven thousand, one hundred forty".