31430164 has 6 divisors (see below), whose sum is σ = 55002794. Its totient is φ = 15715080.

The previous prime is 31430143. The next prime is 31430177. The reversal of 31430164 is 46103413.

It can be written as a sum of positive squares in only one way, i.e., 31136400 + 293764 = 5580^2 + 542^2 .

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, 3928767 + ... + 3928774.

Almost surely, 2^31430164 is an apocalyptic number.

It is an amenable number.

31430164 is a deficient number, since it is larger than the sum of its proper divisors (23572630).

31430164 is a wasteful number, since it uses less digits than its factorization.

31430164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7857545 (or 7857543 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31430164 is about 5606.2611426868. The cubic root of 31430164 is about 315.5844160346.

Adding to 31430164 its reverse (46103413), we get a palindrome (77533577).

The spelling of 31430164 in words is "thirty-one million, four hundred thirty thousand, one hundred sixty-four".