55422515 has 4 divisors (see below), whose sum is σ = 66507024. Its totient is φ = 44338008.

The previous prime is 55422491. The next prime is 55422551. The reversal of 55422515 is 51522455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55422515 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5542247 + ... + 5542256.

It is an arithmetic number, because the mean of its divisors is an integer number (16626756).

Almost surely, 2^55422515 is an apocalyptic number.

55422515 is a deficient number, since it is larger than the sum of its proper divisors (11084509).

55422515 is a wasteful number, since it uses less digits than its factorization.

55422515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11084508.

The product of its digits is 10000, while the sum is 29.

The square root of 55422515 is about 7444.6299437917. The cubic root of 55422515 is about 381.2665838885.

The spelling of 55422515 in words is "fifty-five million, four hundred twenty-two thousand, five hundred fifteen".