31160197 has 4 divisors (see below), whose sum is σ = 31180140. Its totient is φ = 31140256.

The previous prime is 31160189. The next prime is 31160231. The reversal of 31160197 is 79106113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79106113 = 29 ⋅2727797.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 18671041 = 3534^2 + 4321^2 .

It is a cyclic number.

It is not a de Polignac number, because 31160197 - 2³ = 31160189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31160137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7408 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (7795035).

Almost surely, 2^31160197 is an apocalyptic number.

It is an amenable number.

31160197 is a deficient number, since it is larger than the sum of its proper divisors (19943).

31160197 is a wasteful number, since it uses less digits than its factorization.

31160197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19942.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 31160197 is about 5582.1319403970. The cubic root of 31160197 is about 314.6782538216.

The spelling of 31160197 in words is "thirty-one million, one hundred sixty thousand, one hundred ninety-seven".