2571513421 has 2 divisors, whose sum is σ = 2571513422. Its totient is φ = 2571513420.

The previous prime is 2571513389. The next prime is 2571513443. The reversal of 2571513421 is 1243151752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1387190025 + 1184323396 = 37245^2 + 34414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2571513421 - 2⁵ = 2571513389 is a prime.

It is a super-2 number, since 2×2571513421² = 13225362548766246482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2571513521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1285756710 + 1285756711.

It is an arithmetic number, because the mean of its divisors is an integer number (1285756711).

Almost surely, 2^2571513421 is an apocalyptic number.

It is an amenable number.

2571513421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2571513421 is an equidigital number, since it uses as much as digits as its factorization.

2571513421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 2571513421 is about 50710.0919048664. The cubic root of 2571513421 is about 1370.0284898261.

The spelling of 2571513421 in words is "two billion, five hundred seventy-one million, five hundred thirteen thousand, four hundred twenty-one".