55869012 has 18 divisors (see below), whose sum is σ = 141224538. Its totient is φ = 18622992.

The previous prime is 55869007. The next prime is 55869029. The reversal of 55869012 is 21096855.

It is a happy number.

55869012 is a `hidden beast` number, since 558 + 6 + 90 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54110736 + 1758276 = 7356^2 + 1326^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×55869012² = 6242693003712288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1551917 = 55869012 / (5 + 5 + 8 + 6 + 9 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 775923 + ... + 775994.

Almost surely, 2^55869012 is an apocalyptic number.

It is an amenable number.

55869012 is an abundant number, since it is smaller than the sum of its proper divisors (85355526).

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

55869012 is a wasteful number, since it uses less digits than its factorization.

55869012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551927 (or 1551922 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 55869012 is about 7474.5576457741. The cubic root of 55869012 is about 382.2877048260.

The spelling of 55869012 in words is "fifty-five million, eight hundred sixty-nine thousand, twelve".