55057988 has 6 divisors (see below), whose sum is σ = 96351486. Its totient is φ = 27528992.

The previous prime is 55057969. The next prime is 55057997. The reversal of 55057988 is 88975055.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 1592644 = 7312^2 + 1262^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6882245 + ... + 6882252.

It is an arithmetic number, because the mean of its divisors is an integer number (16058581).

Almost surely, 2^55057988 is an apocalyptic number.

It is an amenable number.

55057988 is a deficient number, since it is larger than the sum of its proper divisors (41293498).

55057988 is a wasteful number, since it uses less digits than its factorization.

55057988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13764501 (or 13764499 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 47.

The square root of 55057988 is about 7420.1070073147. The cubic root of 55057988 is about 380.4288510159.

The spelling of 55057988 in words is "fifty-five million, fifty-seven thousand, nine hundred eighty-eight".