31130641 has 2 divisors, whose sum is σ = 31130642. Its totient is φ = 31130640.

The previous prime is 31130633. The next prime is 31130651. The reversal of 31130641 is 14603113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18740241 + 12390400 = 4329^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 31130641 - 2³ = 31130633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31130611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15565320 + 15565321.

It is an arithmetic number, because the mean of its divisors is an integer number (15565321).

Almost surely, 2^31130641 is an apocalyptic number.

It is an amenable number.

31130641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31130641 is an equidigital number, since it uses as much as digits as its factorization.

31130641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31130641 is about 5579.4839367096. The cubic root of 31130641 is about 314.5787297115.

Adding to 31130641 its reverse (14603113), we get a palindrome (45733754).

The spelling of 31130641 in words is "thirty-one million, one hundred thirty thousand, six hundred forty-one".