55751311 has 16 divisors (see below), whose sum is σ = 71907840. Its totient is φ = 41942880.

The previous prime is 55751281. The next prime is 55751317. The reversal of 55751311 is 11315755.

It is not a de Polignac number, because 55751311 - 2¹⁵ = 55718543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55751311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55751317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10251 + ... + 14716.

It is an arithmetic number, because the mean of its divisors is an integer number (4494240).

Almost surely, 2^55751311 is an apocalyptic number.

55751311 is a deficient number, since it is larger than the sum of its proper divisors (16156529).

55751311 is a wasteful number, since it uses less digits than its factorization.

55751311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25014.

The product of its digits is 2625, while the sum is 28.

The square root of 55751311 is about 7466.6800520713. The cubic root of 55751311 is about 382.0190569150.

Subtracting from 55751311 its reverse (11315755), we obtain a square (44435556 = 6666²).

It can be divided in two parts, 5575 and 1311, that added together give a palindrome (6886).

The spelling of 55751311 in words is "fifty-five million, seven hundred fifty-one thousand, three hundred eleven".