55364391 has 24 divisors (see below), whose sum is σ = 84970704. Its totient is φ = 36002880.

The previous prime is 55364389. The next prime is 55364411. The reversal of 55364391 is 19346355.

55364391 is a `hidden beast` number, since 5 + 5 + 3 + 643 + 9 + 1 = 666.

It is not a de Polignac number, because 55364391 - 2¹ = 55364389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55365391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7185 + ... + 12741.

It is an arithmetic number, because the mean of its divisors is an integer number (3540446).

Almost surely, 2^55364391 is an apocalyptic number.

55364391 is a deficient number, since it is larger than the sum of its proper divisors (29606313).

55364391 is an equidigital number, since it uses as much as digits as its factorization.

55364391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613 (or 5601 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 55364391 is about 7440.7251662724. The cubic root of 55364391 is about 381.1332536561.

It can be divided in two parts, 55364 and 391, that added together give a palindrome (55755).

The spelling of 55364391 in words is "fifty-five million, three hundred sixty-four thousand, three hundred ninety-one".