31421164 has 12 divisors (see below), whose sum is σ = 55029744. Its totient is φ = 15698384.

The previous prime is 31421153. The next prime is 31421189. The reversal of 31421164 is 46112413.

It is a super-2 number, since 2×31421164² = 1974579094229792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262 + ... + 9514.

It is an arithmetic number, because the mean of its divisors is an integer number (4585812).

Almost surely, 2^31421164 is an apocalyptic number.

It is an amenable number.

31421164 is a deficient number, since it is larger than the sum of its proper divisors (23608580).

31421164 is a wasteful number, since it uses less digits than its factorization.

31421164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104 (or 6102 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 31421164 is about 5605.4584112274. The cubic root of 31421164 is about 315.5542907184.

Adding to 31421164 its reverse (46112413), we get a palindrome (77533577).

The spelling of 31421164 in words is "thirty-one million, four hundred twenty-one thousand, one hundred sixty-four".