55215064 has 16 divisors (see below), whose sum is σ = 108977400. Its totient is φ = 26154432.

The previous prime is 55215047. The next prime is 55215071. The reversal of 55215064 is 46051255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181477 + ... + 181780.

Almost surely, 2^55215064 is an apocalyptic number.

It is an amenable number.

55215064 is a deficient number, since it is larger than the sum of its proper divisors (53762336).

55215064 is a wasteful number, since it uses less digits than its factorization.

55215064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363282 (or 363278 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 55215064 is about 7430.6839523694. The cubic root of 55215064 is about 380.7902851310.

It can be divided in two parts, 5521 and 5064, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 55215064 in words is "fifty-five million, two hundred fifteen thousand, sixty-four".