55511516 has 6 divisors (see below), whose sum is σ = 97145160. Its totient is φ = 27755756.

The previous prime is 55511509. The next prime is 55511537. The reversal of 55511516 is 61511555.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938936 + ... + 6938943.

It is an arithmetic number, because the mean of its divisors is an integer number (16190860).

Almost surely, 2^55511516 is an apocalyptic number.

It is an amenable number.

55511516 is a deficient number, since it is larger than the sum of its proper divisors (41633644).

55511516 is a wasteful number, since it uses less digits than its factorization.

55511516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13877883 (or 13877881 counting only the distinct ones).

The product of its digits is 3750, while the sum is 29.

The square root of 55511516 is about 7450.6050760995. The cubic root of 55511516 is about 381.4705621179.

The spelling of 55511516 in words is "fifty-five million, five hundred eleven thousand, five hundred sixteen".