31056461 has 4 divisors (see below), whose sum is σ = 31405500. Its totient is φ = 30707424.

The previous prime is 31056437. The next prime is 31056491. The reversal of 31056461 is 16465013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18232900 + 12823561 = 4270^2 + 3581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31056461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31056461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31056491) 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, 174386 + ... + 174563.

It is an arithmetic number, because the mean of its divisors is an integer number (7851375).

Almost surely, 2^31056461 is an apocalyptic number.

It is an amenable number.

31056461 is a deficient number, since it is larger than the sum of its proper divisors (349039).

31056461 is an equidigital number, since it uses as much as digits as its factorization.

31056461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349038.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31056461 is about 5572.8324037243. The cubic root of 31056461 is about 314.3286651552.

The spelling of 31056461 in words is "thirty-one million, fifty-six thousand, four hundred sixty-one".