55512690 has 16 divisors (see below), whose sum is σ = 133230528. Its totient is φ = 14803376.

The previous prime is 55512689. The next prime is 55512703. The reversal of 55512690 is 9621555.

It is a super-2 number, since 2×55512690² = 6163317502072200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925182 + ... + 925241.

It is an arithmetic number, because the mean of its divisors is an integer number (8326908).

Almost surely, 2^55512690 is an apocalyptic number.

55512690 is an abundant number, since it is smaller than the sum of its proper divisors (77717838).

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

55512690 is a wasteful number, since it uses less digits than its factorization.

55512690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850433.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 55512690 is about 7450.6838612305. The cubic root of 55512690 is about 381.4732513094.

The spelling of 55512690 in words is "fifty-five million, five hundred twelve thousand, six hundred ninety".