31377442 has 4 divisors (see below), whose sum is σ = 47066166. Its totient is φ = 15688720.

The previous prime is 31377433. The next prime is 31377469. The reversal of 31377442 is 24477313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31371201 + 6241 = 5601^2 + 79^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7844359 + ... + 7844362.

Almost surely, 2^31377442 is an apocalyptic number.

31377442 is a deficient number, since it is larger than the sum of its proper divisors (15688724).

31377442 is a wasteful number, since it uses less digits than its factorization.

31377442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15688723.

The product of its digits is 14112, while the sum is 31.

The square root of 31377442 is about 5601.5571049486. The cubic root of 31377442 is about 315.4078600205.

The spelling of 31377442 in words is "thirty-one million, three hundred seventy-seven thousand, four hundred forty-two".