2571425561 has 4 divisors (see below), whose sum is σ = 2583612624. Its totient is φ = 2559238500.

The previous prime is 2571425557. The next prime is 2571425567. The reversal of 2571425561 is 1655241752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2571425561 - 2² = 2571425557 is a prime.

It is a super-2 number, since 2×2571425561² = 13224458831528329442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2571425567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6093215 + ... + 6093636.

It is an arithmetic number, because the mean of its divisors is an integer number (645903156).

Almost surely, 2^2571425561 is an apocalyptic number.

It is an amenable number.

2571425561 is a deficient number, since it is larger than the sum of its proper divisors (12187063).

2571425561 is a wasteful number, since it uses less digits than its factorization.

2571425561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12187062.

The product of its digits is 84000, while the sum is 38.

The square root of 2571425561 is about 50709.2256004763. The cubic root of 2571425561 is about 1370.0128865536.

The spelling of 2571425561 in words is "two billion, five hundred seventy-one million, four hundred twenty-five thousand, five hundred sixty-one".