55812757 has 24 divisors (see below), whose sum is σ = 75366720. Its totient is φ = 40135680.

The previous prime is 55812749. The next prime is 55812781. The reversal of 55812757 is 75721855.

55812757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55812757 - 2³ = 55812749 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55812707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10869 + ... + 15157.

It is an arithmetic number, because the mean of its divisors is an integer number (3140280).

Almost surely, 2^55812757 is an apocalyptic number.

It is an amenable number.

55812757 is a deficient number, since it is larger than the sum of its proper divisors (19553963).

55812757 is a wasteful number, since it uses less digits than its factorization.

55812757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333 (or 4320 counting only the distinct ones).

The product of its digits is 98000, while the sum is 40.

The square root of 55812757 is about 7470.7935990763. The cubic root of 55812757 is about 382.1593521181.

It can be divided in two parts, 5581 and 2757, that added together give a palindrome (8338).

The spelling of 55812757 in words is "fifty-five million, eight hundred twelve thousand, seven hundred fifty-seven".