31942745 has 16 divisors (see below), whose sum is σ = 42353280. Its totient is φ = 23003904.

The previous prime is 31942733. The next prime is 31942747. The reversal of 31942745 is 54724913.

It is a cyclic number.

It is not a de Polignac number, because 31942745 - 2⁶ = 31942681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31942747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6215 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (2647080).

Almost surely, 2^31942745 is an apocalyptic number.

It is an amenable number.

31942745 is a deficient number, since it is larger than the sum of its proper divisors (10410535).

31942745 is a wasteful number, since it uses less digits than its factorization.

31942745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16384.

The product of its digits is 30240, while the sum is 35.

The square root of 31942745 is about 5651.7913089568. The cubic root of 31942745 is about 317.2907501717.

The spelling of 31942745 in words is "thirty-one million, nine hundred forty-two thousand, seven hundred forty-five".