55004431 has 8 divisors (see below), whose sum is σ = 57474144. Its totient is φ = 52541280.

The previous prime is 55004419. The next prime is 55004437. The reversal of 55004431 is 13440055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55004431 - 2⁵ = 55004399 is a prime.

It is a super-2 number, since 2×55004431² = 6050974859267522, 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 (55004437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24621 + ... + 26761.

It is an arithmetic number, because the mean of its divisors is an integer number (7184268).

Almost surely, 2^55004431 is an apocalyptic number.

55004431 is a deficient number, since it is larger than the sum of its proper divisors (2469713).

55004431 is a wasteful number, since it uses less digits than its factorization.

55004431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55004431 is about 7416.4972190381. The cubic root of 55004431 is about 380.3054584579.

Adding to 55004431 its reverse (13440055), we get a palindrome (68444486).

The spelling of 55004431 in words is "fifty-five million, four thousand, four hundred thirty-one".