31030164 has 72 divisors (see below), whose sum is σ = 86381568. Its totient is φ = 9313920.

The previous prime is 31030159. The next prime is 31030171. The reversal of 31030164 is 46103013.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49984 + ... + 50600.

It is an arithmetic number, because the mean of its divisors is an integer number (1199744).

Almost surely, 2^31030164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31030164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43190784).

31030164 is an abundant number, since it is smaller than the sum of its proper divisors (55351404).

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

31030164 is a wasteful number, since it uses less digits than its factorization.

31030164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 760 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 31030164 is about 5570.4725113764. The cubic root of 31030164 is about 314.2399210336.

Adding to 31030164 its reverse (46103013), we get a palindrome (77133177).

The spelling of 31030164 in words is "thirty-one million, thirty thousand, one hundred sixty-four".