13215631061 has 2 divisors, whose sum is σ = 13215631062. Its totient is φ = 13215631060.

The previous prime is 13215631001. The next prime is 13215631087. The reversal of 13215631061 is 16013651231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8163122500 + 5052508561 = 90350^2 + 71081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13215631061 - 2¹⁰ = 13215630037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13215631001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607815530 + 6607815531.

It is an arithmetic number, because the mean of its divisors is an integer number (6607815531).

Almost surely, 2^13215631061 is an apocalyptic number.

It is an amenable number.

13215631061 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215631061 is an equidigital number, since it uses as much as digits as its factorization.

13215631061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 13215631061 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, sixty-one".