55811379 has 32 divisors (see below), whose sum is σ = 85254400. Its totient is φ = 32192640.

The previous prime is 55811359. The next prime is 55811389. The reversal of 55811379 is 97311855.

It is not a de Polignac number, because 55811379 - 2⁷ = 55811251 is a prime.

It is a super-2 number, since 2×55811379² = 6229820051763282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55811309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80424 + ... + 81114.

It is an arithmetic number, because the mean of its divisors is an integer number (2664200).

Almost surely, 2^55811379 is an apocalyptic number.

55811379 is a deficient number, since it is larger than the sum of its proper divisors (29443021).

55811379 is a wasteful number, since it uses less digits than its factorization.

55811379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835.

The product of its digits is 37800, while the sum is 39.

The square root of 55811379 is about 7470.7013726959. The cubic root of 55811379 is about 382.1562069595.

The spelling of 55811379 in words is "fifty-five million, eight hundred eleven thousand, three hundred seventy-nine".