31797245 has 8 divisors (see below), whose sum is σ = 39188184. Its totient is φ = 24750144.

The previous prime is 31797229. The next prime is 31797313. The reversal of 31797245 is 54279713.

It can be written as a sum of positive squares in 4 ways, for example, as 10903204 + 20894041 = 3302^2 + 4571^2 .

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 31797245 - 2⁴ = 31797229 is a prime.

It is a super-2 number, since 2×31797245² = 2022129579180050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31797199 and 31797208.

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, 85754 + ... + 86123.

It is an arithmetic number, because the mean of its divisors is an integer number (4898523).

Almost surely, 2^31797245 is an apocalyptic number.

It is an amenable number.

31797245 is a deficient number, since it is larger than the sum of its proper divisors (7390939).

31797245 is a wasteful number, since it uses less digits than its factorization.

31797245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171919.

The product of its digits is 52920, while the sum is 38.

The square root of 31797245 is about 5638.9045922058. The cubic root of 31797245 is about 316.8082610855.

The spelling of 31797245 in words is "thirty-one million, seven hundred ninety-seven thousand, two hundred forty-five".