31423164 has 24 divisors (see below), whose sum is σ = 74565120. Its totient is φ = 10296624.

The previous prime is 31423159. The next prime is 31423187. The reversal of 31423164 is 46132413.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 21484 + ... + 22899.

It is an arithmetic number, because the mean of its divisors is an integer number (3106880).

Almost surely, 2^31423164 is an apocalyptic number.

It is an amenable number.

31423164 is an abundant number, since it is smaller than the sum of its proper divisors (43141956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31423164 is a wasteful number, since it uses less digits than its factorization.

31423164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44449 (or 44447 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 31423164 is about 5605.6368059303. The cubic root of 31423164 is about 315.5609857302.

Adding to 31423164 its reverse (46132413), we get a palindrome (77555577).

The spelling of 31423164 in words is "thirty-one million, four hundred twenty-three thousand, one hundred sixty-four".