31312342 has 16 divisors (see below), whose sum is σ = 50592960. Its totient is φ = 14486472.

The previous prime is 31312327. The next prime is 31312363. The reversal of 31312342 is 24321313.

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 7948 + ... + 11215.

It is an arithmetic number, because the mean of its divisors is an integer number (3162060).

Almost surely, 2^31312342 is an apocalyptic number.

31312342 is a deficient number, since it is larger than the sum of its proper divisors (19280618).

31312342 is a wasteful number, since it uses less digits than its factorization.

31312342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19227.

The product of its digits is 432, while the sum is 19.

The square root of 31312342 is about 5595.7432035432. The cubic root of 31312342 is about 315.1895793385.

Adding to 31312342 its reverse (24321313), we get a palindrome (55633655).

The spelling of 31312342 in words is "thirty-one million, three hundred twelve thousand, three hundred forty-two".