55145912 has 8 divisors (see below), whose sum is σ = 103398600. Its totient is φ = 27572952.

The previous prime is 55145911. The next prime is 55145933. The reversal of 55145912 is 21954155.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×55145912² = 6082143220623488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55145911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3446612 + ... + 3446627.

It is an arithmetic number, because the mean of its divisors is an integer number (12924825).

Almost surely, 2^55145912 is an apocalyptic number.

It is an amenable number.

55145912 is a deficient number, since it is larger than the sum of its proper divisors (48252688).

55145912 is a wasteful number, since it uses less digits than its factorization.

55145912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6893245 (or 6893241 counting only the distinct ones).

The product of its digits is 9000, while the sum is 32.

The square root of 55145912 is about 7426.0293562576. The cubic root of 55145912 is about 380.6312499659.

The spelling of 55145912 in words is "fifty-five million, one hundred forty-five thousand, nine hundred twelve".