55204431 has 8 divisors (see below), whose sum is σ = 73686960. Its totient is φ = 36762432.

The previous prime is 55204421. The next prime is 55204441. The reversal of 55204431 is 13440255.

It is an interprime number because it is at equal distance from previous prime (55204421) and next prime (55204441).

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

It is not a de Polignac number, because 55204431 - 2⁵ = 55204399 is a prime.

It is a super-2 number, since 2×55204431² = 6095058404067522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55204411) 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, 6796 + ... + 12513.

It is an arithmetic number, because the mean of its divisors is an integer number (9210870).

Almost surely, 2^55204431 is an apocalyptic number.

55204431 is a deficient number, since it is larger than the sum of its proper divisors (18482529).

55204431 is a wasteful number, since it uses less digits than its factorization.

55204431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20265.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 55204431 is about 7429.9684386947. The cubic root of 55204431 is about 380.7658400929.

Adding to 55204431 its reverse (13440255), we get a palindrome (68644686).

The spelling of 55204431 in words is "fifty-five million, two hundred four thousand, four hundred thirty-one".