55507738 has 16 divisors (see below), whose sum is σ = 97818336. Its totient is φ = 23289840.

The previous prime is 55507723. The next prime is 55507757. The reversal of 55507738 is 83770555.

It is a super-2 number, since 2×55507738² = 6162217955753288, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 55507738.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96756 + ... + 97327.

It is an arithmetic number, because the mean of its divisors is an integer number (6113646).

Almost surely, 2^55507738 is an apocalyptic number.

55507738 is a deficient number, since it is larger than the sum of its proper divisors (42310598).

55507738 is a wasteful number, since it uses less digits than its factorization.

55507738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194109.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 55507738 is about 7450.3515353304. The cubic root of 55507738 is about 381.4619078867.

The spelling of 55507738 in words is "fifty-five million, five hundred seven thousand, seven hundred thirty-eight".