55420015 has 16 divisors (see below), whose sum is σ = 78626880. Its totient is φ = 36691200.

The previous prime is 55419929. The next prime is 55420039. The reversal of 55420015 is 51002455.

It is not a de Polignac number, because 55420015 - 2⁷ = 55419887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26286 + ... + 28315.

It is an arithmetic number, because the mean of its divisors is an integer number (4914180).

Almost surely, 2^55420015 is an apocalyptic number.

55420015 is a deficient number, since it is larger than the sum of its proper divisors (23206865).

55420015 is a wasteful number, since it uses less digits than its factorization.

55420015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54642.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55420015 is about 7444.4620356343. The cubic root of 55420015 is about 381.2608510752.

The spelling of 55420015 in words is "fifty-five million, four hundred twenty thousand, fifteen".