55426431 has 4 divisors (see below), whose sum is σ = 73901912. Its totient is φ = 36950952.

The previous prime is 55426411. The next prime is 55426433. The reversal of 55426431 is 13462455.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55426431 - 2⁹ = 55425919 is a prime.

It is a super-2 number, since 2×55426431² = 6144178506795522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55426433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9237736 + ... + 9237741.

It is an arithmetic number, because the mean of its divisors is an integer number (18475478).

Almost surely, 2^55426431 is an apocalyptic number.

55426431 is a deficient number, since it is larger than the sum of its proper divisors (18475481).

55426431 is a wasteful number, since it uses less digits than its factorization.

55426431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18475480.

The product of its digits is 14400, while the sum is 30.

The square root of 55426431 is about 7444.8929475178. The cubic root of 55426431 is about 381.2755634207.

Adding to 55426431 its reverse (13462455), we get a palindrome (68888886).

The spelling of 55426431 in words is "fifty-five million, four hundred twenty-six thousand, four hundred thirty-one".