55442291 has 16 divisors (see below), whose sum is σ = 59195136. Its totient is φ = 51840000.

The previous prime is 55442273. The next prime is 55442297. The reversal of 55442291 is 19224455.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55442291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55442297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229931 + ... + 230171.

It is an arithmetic number, because the mean of its divisors is an integer number (3699696).

Almost surely, 2^55442291 is an apocalyptic number.

55442291 is a deficient number, since it is larger than the sum of its proper divisors (3752845).

55442291 is a wasteful number, since it uses less digits than its factorization.

55442291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

The product of its digits is 14400, while the sum is 32.

The square root of 55442291 is about 7445.9580310394. The cubic root of 55442291 is about 381.3119266602.

The spelling of 55442291 in words is "fifty-five million, four hundred forty-two thousand, two hundred ninety-one".