56531998 has 8 divisors (see below), whose sum is σ = 84845880. Its totient is φ = 28250040.

The previous prime is 56531983. The next prime is 56532013. The reversal of 56531998 is 89913565.

It is an interprime number because it is at equal distance from previous prime (56531983) and next prime (56532013).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2908 + ... + 11023.

It is an arithmetic number, because the mean of its divisors is an integer number (10605735).

Almost surely, 2^56531998 is an apocalyptic number.

56531998 is a deficient number, since it is larger than the sum of its proper divisors (28313882).

56531998 is a wasteful number, since it uses less digits than its factorization.

56531998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15962.

The product of its digits is 291600, while the sum is 46.

The square root of 56531998 is about 7518.7763632123. The cubic root of 56531998 is about 383.7939387419.

The spelling of 56531998 in words is "fifty-six million, five hundred thirty-one thousand, nine hundred ninety-eight".