31113342 has 128 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 8743680.

The previous prime is 31113323. The next prime is 31113359. The reversal of 31113342 is 24331113.

31113342 is a `hidden beast` number, since 311 + 13 + 342 = 666.

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 63 ways as a sum of consecutive naturals, for example, 661963 + ... + 662009.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^31113342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31113342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40642560).

31113342 is an abundant number, since it is smaller than the sum of its proper divisors (50171778).

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

31113342 is a wasteful number, since it uses less digits than its factorization.

31113342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

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

The square root of 31113342 is about 5577.9334883091. The cubic root of 31113342 is about 314.5204494493.

Adding to 31113342 its reverse (24331113), we get a palindrome (55444455).

The spelling of 31113342 in words is "thirty-one million, one hundred thirteen thousand, three hundred forty-two".