31711415532661 has 2 divisors, whose sum is σ = 31711415532662. Its totient is φ = 31711415532660.

The previous prime is 31711415532611. The next prime is 31711415532683. The reversal of 31711415532661 is 16623551411713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19509800660100 + 12201614872561 = 4416990^2 + 3493081^2 .

It is an emirp because it is prime and its reverse (16623551411713) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31711415532661 - 2⁹ = 31711415532149 is a prime.

It is a super-2 number, since 2×31711415532661² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31711415532611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15855707766330 + 15855707766331.

It is an arithmetic number, because the mean of its divisors is an integer number (15855707766331).

Almost surely, 2^{31711415532661} is an apocalyptic number.

It is an amenable number.

31711415532661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31711415532661 is an equidigital number, since it uses as much as digits as its factorization.

31711415532661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 46.

The spelling of 31711415532661 in words is "thirty-one trillion, seven hundred eleven billion, four hundred fifteen million, five hundred thirty-two thousand, six hundred sixty-one".