2571416621 has 2 divisors, whose sum is σ = 2571416622. Its totient is φ = 2571416620.

The previous prime is 2571416581. The next prime is 2571416657. The reversal of 2571416621 is 1266141752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2389840996 + 181575625 = 48886^2 + 13475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2571416621 - 2³⁰ = 1497674797 is a prime.

It is a super-2 number, since 2×2571416621² = 13224366877510115282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2571416681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1285708310 + 1285708311.

It is an arithmetic number, because the mean of its divisors is an integer number (1285708311).

Almost surely, 2^2571416621 is an apocalyptic number.

It is an amenable number.

2571416621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2571416621 is an equidigital number, since it uses as much as digits as its factorization.

2571416621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 2571416621 is about 50709.1374507593. The cubic root of 2571416621 is about 1370.0112988572.

The spelling of 2571416621 in words is "two billion, five hundred seventy-one million, four hundred sixteen thousand, six hundred twenty-one".