22471015887961 has 2 divisors, whose sum is σ = 22471015887962. Its totient is φ = 22471015887960.

The previous prime is 22471015887863. The next prime is 22471015887977. The reversal of 22471015887961 is 16978851017422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21684566175561 + 786449712400 = 4656669^2 + 886820^2 .

It is a cyclic number.

It is not a de Polignac number, because 22471015887961 - 2¹³ = 22471015879769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22471015887961.

It is not a weakly prime, because it can be changed into another prime (22471015885961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11235507943980 + 11235507943981.

It is an arithmetic number, because the mean of its divisors is an integer number (11235507943981).

Almost surely, 2^{22471015887961} is an apocalyptic number.

It is an amenable number.

22471015887961 is a deficient number, since it is larger than the sum of its proper divisors (1).

22471015887961 is an equidigital number, since it uses as much as digits as its factorization.

22471015887961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 61.

The spelling of 22471015887961 in words is "twenty-two trillion, four hundred seventy-one billion, fifteen million, eight hundred eighty-seven thousand, nine hundred sixty-one".