55150555 has 4 divisors (see below), whose sum is σ = 66180672. Its totient is φ = 44120440.

The previous prime is 55150549. The next prime is 55150577. The reversal of 55150555 is 55505155.

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

It is not a de Polignac number, because 55150555 - 2⁵ = 55150523 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, 5515051 + ... + 5515060.

It is an arithmetic number, because the mean of its divisors is an integer number (16545168).

Almost surely, 2^55150555 is an apocalyptic number.

55150555 is a deficient number, since it is larger than the sum of its proper divisors (11030117).

55150555 is a wasteful number, since it uses less digits than its factorization.

55150555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11030116.

The product of its (nonzero) digits is 15625, while the sum is 31.

The square root of 55150555 is about 7426.3419662711. The cubic root of 55150555 is about 380.6419320590.

The spelling of 55150555 in words is "fifty-five million, one hundred fifty thousand, five hundred fifty-five".