55531870 has 32 divisors (see below), whose sum is σ = 105655680. Its totient is φ = 20956320.

The previous prime is 55531859. The next prime is 55531891. The reversal of 55531870 is 7813555.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62449 + ... + 63331.

It is an arithmetic number, because the mean of its divisors is an integer number (3301740).

Almost surely, 2^55531870 is an apocalyptic number.

55531870 is a deficient number, since it is larger than the sum of its proper divisors (50123810).

55531870 is a wasteful number, since it uses less digits than its factorization.

55531870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 55531870 is about 7451.9708802437. The cubic root of 55531870 is about 381.5171800908.

The spelling of 55531870 in words is "fifty-five million, five hundred thirty-one thousand, eight hundred seventy".