55879551 has 108 divisors (see below), whose sum is σ = 110669832. Its totient is φ = 27923616.

The previous prime is 55879511. The next prime is 55879553. The reversal of 55879551 is 15597855.

55879551 is a `hidden beast` number, since 558 + 7 + 95 + 5 + 1 = 666.

It is not a de Polignac number, because 55879551 - 2⁹ = 55879039 is a prime.

Its product of digits (315000) is a multiple of the sum of its prime divisors (42).

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 55879497 and 55879506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55879553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2941020 + ... + 2941038.

Almost surely, 2^55879551 is an apocalyptic number.

55879551 is a deficient number, since it is larger than the sum of its proper divisors (54790281).

55879551 is a wasteful number, since it uses less digits than its factorization.

55879551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 42 counting only the distinct ones).

The product of its digits is 315000, while the sum is 45.

The square root of 55879551 is about 7475.2626040829. The cubic root of 55879551 is about 382.3117412681.

The spelling of 55879551 in words is "fifty-five million, eight hundred seventy-nine thousand, five hundred fifty-one".