31042342 has 4 divisors (see below), whose sum is σ = 46563516. Its totient is φ = 15521170.

The previous prime is 31042337. The next prime is 31042367. The reversal of 31042342 is 24324013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24324013 = 7 ⋅3474859.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7760584 + ... + 7760587.

It is an arithmetic number, because the mean of its divisors is an integer number (11640879).

Almost surely, 2^31042342 is an apocalyptic number.

31042342 is a deficient number, since it is larger than the sum of its proper divisors (15521174).

31042342 is a wasteful number, since it uses less digits than its factorization.

31042342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15521173.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31042342 is about 5571.5654891601. The cubic root of 31042342 is about 314.2810241921.

Adding to 31042342 its reverse (24324013), we get a palindrome (55366355).

The spelling of 31042342 in words is "thirty-one million, forty-two thousand, three hundred forty-two".