31459000561 has 2 divisors, whose sum is σ = 31459000562. Its totient is φ = 31459000560.

The previous prime is 31459000493. The next prime is 31459000571. The reversal of 31459000561 is 16500095413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31258240000 + 200760561 = 176800^2 + 14169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31459000561 is a prime.

It is not a weakly prime, because it can be changed into another prime (31459000571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15729500280 + 15729500281.

It is an arithmetic number, because the mean of its divisors is an integer number (15729500281).

Almost surely, 2^31459000561 is an apocalyptic number.

It is an amenable number.

31459000561 is a deficient number, since it is larger than the sum of its proper divisors (1).

31459000561 is an equidigital number, since it uses as much as digits as its factorization.

31459000561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

Adding to 31459000561 its reverse (16500095413), we get a palindrome (47959095974).

The spelling of 31459000561 in words is "thirty-one billion, four hundred fifty-nine million, five hundred sixty-one", and thus it is an aban number.