55431255 has 32 divisors (see below), whose sum is σ = 99883008. Its totient is φ = 26006400.

The previous prime is 55431253. The next prime is 55431281. The reversal of 55431255 is 55213455.

It is a happy number.

It is not a de Polignac number, because 55431255 - 2¹ = 55431253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55431253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304 + ... + 10533.

It is an arithmetic number, because the mean of its divisors is an integer number (3121344).

Almost surely, 2^55431255 is an apocalyptic number.

55431255 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55431255 is a deficient number, since it is larger than the sum of its proper divisors (44451753).

55431255 is a wasteful number, since it uses less digits than its factorization.

55431255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10887.

The product of its digits is 15000, while the sum is 30.

The square root of 55431255 is about 7445.2169209500. The cubic root of 55431255 is about 381.2866244490.

The spelling of 55431255 in words is "fifty-five million, four hundred thirty-one thousand, two hundred fifty-five".