55287516 has 48 divisors (see below), whose sum is σ = 133555968. Its totient is φ = 17788800.

The previous prime is 55287497. The next prime is 55287527. The reversal of 55287516 is 61578255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50131 + ... + 51221.

It is an arithmetic number, because the mean of its divisors is an integer number (2782416).

Almost surely, 2^55287516 is an apocalyptic number.

It is an amenable number.

55287516 is an abundant number, since it is smaller than the sum of its proper divisors (78268452).

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

55287516 is a wasteful number, since it uses less digits than its factorization.

55287516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1240 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 55287516 is about 7435.5575446633. The cubic root of 55287516 is about 380.9567672303.

The spelling of 55287516 in words is "fifty-five million, two hundred eighty-seven thousand, five hundred sixteen".