31807342 has 8 divisors (see below), whose sum is σ = 54526896. Its totient is φ = 13631712.

The previous prime is 31807339. The next prime is 31807397. The reversal of 31807342 is 24370813.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31807342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135963 + ... + 1135990.

It is an arithmetic number, because the mean of its divisors is an integer number (6815862).

Almost surely, 2^31807342 is an apocalyptic number.

31807342 is a deficient number, since it is larger than the sum of its proper divisors (22719554).

31807342 is a wasteful number, since it uses less digits than its factorization.

31807342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271962.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 31807342 is about 5639.7998191425. The cubic root of 31807342 is about 316.8417909766.

Subtracting from 31807342 its reverse (24370813), we obtain a square (7436529 = 2727²).

The spelling of 31807342 in words is "thirty-one million, eight hundred seven thousand, three hundred forty-two".