31421704 has 8 divisors (see below), whose sum is σ = 58915710. Its totient is φ = 15710848.

The previous prime is 31421699. The next prime is 31421711. The reversal of 31421704 is 40712413.

It can be written as a sum of positive squares in only one way, i.e., 31337604 + 84100 = 5598^2 + 290^2 .

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, 1963849 + ... + 1963864.

Almost surely, 2^31421704 is an apocalyptic number.

It is an amenable number.

31421704 is a deficient number, since it is larger than the sum of its proper divisors (27494006).

31421704 is a wasteful number, since it uses less digits than its factorization.

31421704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927719 (or 3927715 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 31421704 is about 5605.5065783567. The cubic root of 31421704 is about 315.5560983996.

The spelling of 31421704 in words is "thirty-one million, four hundred twenty-one thousand, seven hundred four".