31403164 has 12 divisors (see below), whose sum is σ = 59182984. Its totient is φ = 14493744.

The previous prime is 31403161. The next prime is 31403167. The reversal of 31403164 is 46130413.

It is an interprime number because it is at equal distance from previous prime (31403161) and next prime (31403167).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301902 + ... + 302005.

Almost surely, 2^31403164 is an apocalyptic number.

It is an amenable number.

31403164 is a deficient number, since it is larger than the sum of its proper divisors (27779820).

31403164 is a wasteful number, since it uses less digits than its factorization.

31403164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603924 (or 603922 counting only the distinct ones).

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

The square root of 31403164 is about 5603.8526033435. The cubic root of 31403164 is about 315.4940228239.

Adding to 31403164 its reverse (46130413), we get a palindrome (77533577).

The spelling of 31403164 in words is "thirty-one million, four hundred three thousand, one hundred sixty-four".