55431855 has 24 divisors (see below), whose sum is σ = 96450432. Its totient is φ = 29450304.

The previous prime is 55431853. The next prime is 55431881. The reversal of 55431855 is 55813455.

It is a happy number.

It is not a de Polignac number, because 55431855 - 2¹ = 55431853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55431853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10242 + ... + 14688.

It is an arithmetic number, because the mean of its divisors is an integer number (4018768).

Almost surely, 2^55431855 is an apocalyptic number.

55431855 is a deficient number, since it is larger than the sum of its proper divisors (41018577).

55431855 is a wasteful number, since it uses less digits than its factorization.

55431855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4735 (or 4732 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The square root of 55431855 is about 7445.2572151673. The cubic root of 55431855 is about 381.2880001539.

The spelling of 55431855 in words is "fifty-five million, four hundred thirty-one thousand, eight hundred fifty-five".