55132431 has 4 divisors (see below), whose sum is σ = 73509912. Its totient is φ = 36754952.

The previous prime is 55132397. The next prime is 55132453. The reversal of 55132431 is 13423155.

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 55132431 - 2⁶ = 55132367 is a prime.

It is a super-2 number, since 2×55132431² = 6079169895939522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55132531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9188736 + ... + 9188741.

It is an arithmetic number, because the mean of its divisors is an integer number (18377478).

Almost surely, 2^55132431 is an apocalyptic number.

55132431 is a deficient number, since it is larger than the sum of its proper divisors (18377481).

55132431 is a wasteful number, since it uses less digits than its factorization.

55132431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18377480.

The product of its digits is 1800, while the sum is 24.

The square root of 55132431 is about 7425.1216151656. The cubic root of 55132431 is about 380.6002309965.

Adding to 55132431 its reverse (13423155), we get a palindrome (68555586).

The spelling of 55132431 in words is "fifty-five million, one hundred thirty-two thousand, four hundred thirty-one".