31411230661 has 2 divisors, whose sum is σ = 31411230662. Its totient is φ = 31411230660.

The previous prime is 31411230649. The next prime is 31411230671. The reversal of 31411230661 is 16603211413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26326685025 + 5084545636 = 162255^2 + 71306^2 .

It is an emirp because it is prime and its reverse (16603211413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31411230661 - 2²⁵ = 31377676229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31411230671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15705615330 + 15705615331.

It is an arithmetic number, because the mean of its divisors is an integer number (15705615331).

Almost surely, 2^31411230661 is an apocalyptic number.

It is an amenable number.

31411230661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31411230661 is an equidigital number, since it uses as much as digits as its factorization.

31411230661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The spelling of 31411230661 in words is "thirty-one billion, four hundred eleven million, two hundred thirty thousand, six hundred sixty-one".