31442072 has 8 divisors (see below), whose sum is σ = 58953900. Its totient is φ = 15721032.

The previous prime is 31442069. The next prime is 31442083. The reversal of 31442072 is 27024413.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965122 + ... + 1965137.

Almost surely, 2^31442072 is an apocalyptic number.

It is an amenable number.

31442072 is a deficient number, since it is larger than the sum of its proper divisors (27511828).

31442072 is a wasteful number, since it uses less digits than its factorization.

31442072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930265 (or 3930261 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 31442072 is about 5607.3230689876. The cubic root of 31442072 is about 315.6242663382.

Adding to 31442072 its reverse (27024413), we get a palindrome (58466485).

The spelling of 31442072 in words is "thirty-one million, four hundred forty-two thousand, seventy-two".