31442642 has 16 divisors (see below), whose sum is σ = 58802112. Its totient is φ = 12250320.

The previous prime is 31442629. The next prime is 31442657. The reversal of 31442642 is 24624413.

It is a super-3 number, since 3×31442642³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101933 + ... + 102240.

It is an arithmetic number, because the mean of its divisors is an integer number (3675132).

Almost surely, 2^31442642 is an apocalyptic number.

31442642 is a deficient number, since it is larger than the sum of its proper divisors (27359470).

31442642 is a wasteful number, since it uses less digits than its factorization.

31442642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204193.

The product of its digits is 4608, while the sum is 26.

The square root of 31442642 is about 5607.3738951491. The cubic root of 31442642 is about 315.6261735995.

The spelling of 31442642 in words is "thirty-one million, four hundred forty-two thousand, six hundred forty-two".