31345542 has 28 divisors (see below), whose sum is σ = 70498500. Its totient is φ = 10448028.

The previous prime is 31345537. The next prime is 31345553. The reversal of 31345542 is 24554313.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 9292 + ... + 12207.

Almost surely, 2^31345542 is an apocalyptic number.

31345542 is an abundant number, since it is smaller than the sum of its proper divisors (39152958).

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

31345542 is an equidigital number, since it uses as much as digits as its factorization.

31345542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21519 (or 21504 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 31345542 is about 5598.7089583224. The cubic root of 31345542 is about 315.3009368966.

Adding to 31345542 its reverse (24554313), we get a palindrome (55899855).

The spelling of 31345542 in words is "thirty-one million, three hundred forty-five thousand, five hundred forty-two".