55344431 has 4 divisors (see below), whose sum is σ = 55412664. Its totient is φ = 55276200.

The previous prime is 55344409. The next prime is 55344437. The reversal of 55344431 is 13444355.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55344431 is a prime.

It is a super-2 number, since 2×55344431² = 6126012085427522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55344394 and 55344403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55344437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32885 + ... + 34526.

It is an arithmetic number, because the mean of its divisors is an integer number (13853166).

Almost surely, 2^55344431 is an apocalyptic number.

55344431 is a deficient number, since it is larger than the sum of its proper divisors (68233).

55344431 is an equidigital number, since it uses as much as digits as its factorization.

55344431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68232.

The product of its digits is 14400, while the sum is 29.

The square root of 55344431 is about 7439.3837782440. The cubic root of 55344431 is about 381.0874460290.

Adding to 55344431 its reverse (13444355), we get a palindrome (68788786).

The spelling of 55344431 in words is "fifty-five million, three hundred forty-four thousand, four hundred thirty-one".