55518536 has 8 divisors (see below), whose sum is σ = 104097270. Its totient is φ = 27759264.

The previous prime is 55518523. The next prime is 55518539. The reversal of 55518536 is 63581555.

It can be written as a sum of positive squares in only one way, i.e., 33709636 + 21808900 = 5806^2 + 4670^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 55518536.

It is not an unprimeable number, because it can be changed into a prime (55518539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469901 + ... + 3469916.

Almost surely, 2^55518536 is an apocalyptic number.

It is an amenable number.

55518536 is a deficient number, since it is larger than the sum of its proper divisors (48578734).

55518536 is a wasteful number, since it uses less digits than its factorization.

55518536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6939823 (or 6939819 counting only the distinct ones).

The product of its digits is 90000, while the sum is 38.

The square root of 55518536 is about 7451.0761638840. The cubic root of 55518536 is about 381.4866417272.

It can be divided in two parts, 555 and 18536, that added together give a palindrome (19091).

The spelling of 55518536 in words is "fifty-five million, five hundred eighteen thousand, five hundred thirty-six".