31427018 has 8 divisors (see below), whose sum is σ = 53874912. Its totient is φ = 13468716.

The previous prime is 31427003. The next prime is 31427021. The reversal of 31427018 is 81072413.

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

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, 1122380 + ... + 1122407.

It is an arithmetic number, because the mean of its divisors is an integer number (6734364).

Almost surely, 2^31427018 is an apocalyptic number.

31427018 is a deficient number, since it is larger than the sum of its proper divisors (22447894).

31427018 is a wasteful number, since it uses less digits than its factorization.

31427018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244796.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 31427018 is about 5605.9805565128. The cubic root of 31427018 is about 315.5738862168.

The spelling of 31427018 in words is "thirty-one million, four hundred twenty-seven thousand, eighteen".