55233431 has 4 divisors (see below), whose sum is σ = 60254664. Its totient is φ = 50212200.

The previous prime is 55233427. The next prime is 55233469. The reversal of 55233431 is 13433255.

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

It is a cyclic number.

It is not a de Polignac number, because 55233431 - 2² = 55233427 is a prime.

It is a super-2 number, since 2×55233431² = 6101463800063522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55233431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55233631) 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, 2510600 + ... + 2510621.

It is an arithmetic number, because the mean of its divisors is an integer number (15063666).

Almost surely, 2^55233431 is an apocalyptic number.

55233431 is a deficient number, since it is larger than the sum of its proper divisors (5021233).

55233431 is a wasteful number, since it uses less digits than its factorization.

55233431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5021232.

The product of its digits is 5400, while the sum is 26.

The square root of 55233431 is about 7431.9197385332. The cubic root of 55233431 is about 380.8325030772.

Adding to 55233431 its reverse (13433255), we get a palindrome (68666686).

The spelling of 55233431 in words is "fifty-five million, two hundred thirty-three thousand, four hundred thirty-one".