55312516 has 24 divisors (see below), whose sum is σ = 115436160. Its totient is φ = 22674432.

The previous prime is 55312511. The next prime is 55312519. The reversal of 55312516 is 61521355.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (55312511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42301 + ... + 43588.

It is an arithmetic number, because the mean of its divisors is an integer number (4809840).

Almost surely, 2^55312516 is an apocalyptic number.

It is an amenable number.

55312516 is an abundant number, since it is smaller than the sum of its proper divisors (60123644).

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

55312516 is a wasteful number, since it uses less digits than its factorization.

55312516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85923 (or 85921 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 55312516 is about 7437.2384659899. The cubic root of 55312516 is about 381.0141791303.

The spelling of 55312516 in words is "fifty-five million, three hundred twelve thousand, five hundred sixteen".