31357042 has 8 divisors (see below), whose sum is σ = 47059632. Its totient is φ = 15670500.

The previous prime is 31357031. The next prime is 31357063. The reversal of 31357042 is 24075313.

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

It is a junction number, because it is equal to n+sod(n) for n = 31356998 and 31357016.

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, 4417 + ... + 9067.

It is an arithmetic number, because the mean of its divisors is an integer number (5882454).

Almost surely, 2^31357042 is an apocalyptic number.

31357042 is a deficient number, since it is larger than the sum of its proper divisors (15702590).

31357042 is a wasteful number, since it uses less digits than its factorization.

31357042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 31357042 is about 5599.7358866289. The cubic root of 31357042 is about 315.3394912088.

The spelling of 31357042 in words is "thirty-one million, three hundred fifty-seven thousand, forty-two".