31442164 has 24 divisors (see below), whose sum is σ = 59820768. Its totient is φ = 14373600.

The previous prime is 31442161. The next prime is 31442189. The reversal of 31442164 is 46124413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2739 + ... + 8389.

It is an arithmetic number, because the mean of its divisors is an integer number (2492532).

Almost surely, 2^31442164 is an apocalyptic number.

It is an amenable number.

31442164 is a deficient number, since it is larger than the sum of its proper divisors (28378604).

31442164 is a wasteful number, since it uses less digits than its factorization.

31442164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775 (or 5773 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 31442164 is about 5607.3312725395. The cubic root of 31442164 is about 315.6245741784.

Adding to 31442164 its reverse (46124413), we get a palindrome (77566577).

The spelling of 31442164 in words is "thirty-one million, four hundred forty-two thousand, one hundred sixty-four".