2571506465 has 16 divisors (see below), whose sum is σ = 3373966656. Its totient is φ = 1865947200.

The previous prime is 2571506461. The next prime is 2571506503. The reversal of 2571506465 is 5646051752.

It is not a de Polignac number, because 2571506465 - 2² = 2571506461 is a prime.

It is a super-2 number, since 2×2571506465² = 13225290999073592450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2571506461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28406 + ... + 77135.

It is an arithmetic number, because the mean of its divisors is an integer number (210872916).

Almost surely, 2^2571506465 is an apocalyptic number.

It is an amenable number.

2571506465 is a deficient number, since it is larger than the sum of its proper divisors (802460191).

2571506465 is a wasteful number, since it uses less digits than its factorization.

2571506465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106000.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 2571506465 is about 50710.0233188667. The cubic root of 2571506465 is about 1370.0272545060.

The spelling of 2571506465 in words is "two billion, five hundred seventy-one million, five hundred six thousand, four hundred sixty-five".