31957445 has 8 divisors (see below), whose sum is σ = 41298936. Its totient is φ = 23599296.

The previous prime is 31957423. The next prime is 31957451. The reversal of 31957445 is 54475913.

It can be written as a sum of positive squares in 4 ways, for example, as 1674436 + 30283009 = 1294^2 + 5503^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31957445 - 2²⁰ = 30908869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31957399 and 31957408.

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, 245762 + ... + 245891.

It is an arithmetic number, because the mean of its divisors is an integer number (5162367).

Almost surely, 2^31957445 is an apocalyptic number.

It is an amenable number.

31957445 is a deficient number, since it is larger than the sum of its proper divisors (9341491).

31957445 is a wasteful number, since it uses less digits than its factorization.

31957445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491671.

The product of its digits is 75600, while the sum is 38.

The square root of 31957445 is about 5653.0916320187. The cubic root of 31957445 is about 317.3394149387.

The spelling of 31957445 in words is "thirty-one million, nine hundred fifty-seven thousand, four hundred forty-five".