55617516 has 30 divisors (see below), whose sum is σ = 145396020. Its totient is φ = 18539064.

The previous prime is 55617493. The next prime is 55617559. The reversal of 55617516 is 61571655.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85506 + ... + 86153.

It is an arithmetic number, because the mean of its divisors is an integer number (4846534).

Almost surely, 2^55617516 is an apocalyptic number.

It is an amenable number.

55617516 is an abundant number, since it is smaller than the sum of its proper divisors (89778504).

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

55617516 is a wasteful number, since it uses less digits than its factorization.

55617516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171675 (or 171664 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 55617516 is about 7457.7151997110. The cubic root of 55617516 is about 381.7132154875.

The spelling of 55617516 in words is "fifty-five million, six hundred seventeen thousand, five hundred sixteen".