55515204 has 18 divisors (see below), whose sum is σ = 140330190. Its totient is φ = 18505056.

The previous prime is 55515197. The next prime is 55515223. The reversal of 55515204 is 40251555.

It can be written as a sum of positive squares in only one way, i.e., 55353600 + 161604 = 7440^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 5 ways as a sum of consecutive naturals, for example, 771009 + ... + 771080.

Almost surely, 2^55515204 is an apocalyptic number.

It is an amenable number.

55515204 is an abundant number, since it is smaller than the sum of its proper divisors (84814986).

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

55515204 is a wasteful number, since it uses less digits than its factorization.

55515204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542099 (or 1542094 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55515204 is about 7450.8525686662. The cubic root of 55515204 is about 381.4790098082.

Adding to 55515204 its reverse (40251555), we get a palindrome (95766759).

The spelling of 55515204 in words is "fifty-five million, five hundred fifteen thousand, two hundred four".