2471218702861 has 2 divisors, whose sum is σ = 2471218702862. Its totient is φ = 2471218702860.

The previous prime is 2471218702829. The next prime is 2471218702877. The reversal of 2471218702861 is 1682078121742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2197527548836 + 273691154025 = 1482406^2 + 523155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2471218702861 - 2⁵ = 2471218702829 is a prime.

It is a super-2 number, since 2×2471218702861² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2471218702891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1235609351430 + 1235609351431.

It is an arithmetic number, because the mean of its divisors is an integer number (1235609351431).

Almost surely, 2^{2471218702861} is an apocalyptic number.

It is an amenable number.

2471218702861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2471218702861 is an equidigital number, since it uses as much as digits as its factorization.

2471218702861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602112, while the sum is 49.

The spelling of 2471218702861 in words is "two trillion, four hundred seventy-one billion, two hundred eighteen million, seven hundred two thousand, eight hundred sixty-one".