31056161 has 8 divisors (see below), whose sum is σ = 33067944. Its totient is φ = 29064960.

The previous prime is 31056133. The next prime is 31056163. The reversal of 31056161 is 16165013.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1288225 + 29767936 = 1135^2 + 5456^2 .

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 31056161 - 2¹⁴ = 31039777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31056163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1970 + ... + 8123.

It is an arithmetic number, because the mean of its divisors is an integer number (4133493).

Almost surely, 2^31056161 is an apocalyptic number.

It is an amenable number.

31056161 is a deficient number, since it is larger than the sum of its proper divisors (2011783).

31056161 is a wasteful number, since it uses less digits than its factorization.

31056161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10291.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 31056161 is about 5572.8054873645. The cubic root of 31056161 is about 314.3276530319.

The spelling of 31056161 in words is "thirty-one million, fifty-six thousand, one hundred sixty-one".