31421746 has 16 divisors (see below), whose sum is σ = 50009400. Its totient is φ = 14755840.

The previous prime is 31421737. The next prime is 31421759. The reversal of 31421746 is 64712413.

It can be written as a sum of positive squares in 4 ways, for example, as 30371121 + 1050625 = 5511^2 + 1025^2 .

It is a super-2 number, since 2×31421746² = 1974652243377032, which contains 22 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, 29430 + ... + 30478.

Almost surely, 2^31421746 is an apocalyptic number.

31421746 is a deficient number, since it is larger than the sum of its proper divisors (18587654).

31421746 is a wasteful number, since it uses less digits than its factorization.

31421746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949.

The product of its digits is 4032, while the sum is 28.

The square root of 31421746 is about 5605.5103246716. The cubic root of 31421746 is about 315.5562389961.

The spelling of 31421746 in words is "thirty-one million, four hundred twenty-one thousand, seven hundred forty-six".