31442136 has 32 divisors (see below), whose sum is σ = 85752000. Its totient is φ = 9527840.

The previous prime is 31442113. The next prime is 31442141. The reversal of 31442136 is 63124413.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 59286 + ... + 59813.

It is an arithmetic number, because the mean of its divisors is an integer number (2679750).

Almost surely, 2^31442136 is an apocalyptic number.

It is an amenable number.

31442136 is an abundant number, since it is smaller than the sum of its proper divisors (54309864).

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

31442136 is a wasteful number, since it uses less digits than its factorization.

31442136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119119 (or 119115 counting only the distinct ones).

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

The square root of 31442136 is about 5607.3287758076. The cubic root of 31442136 is about 315.6244804880.

Adding to 31442136 its reverse (63124413), we get a palindrome (94566549).

The spelling of 31442136 in words is "thirty-one million, four hundred forty-two thousand, one hundred thirty-six".