2571400969 has 4 divisors (see below), whose sum is σ = 2571560260. Its totient is φ = 2571241680.

The previous prime is 2571400963. The next prime is 2571400981. The reversal of 2571400969 is 9690041752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2467605625 + 103795344 = 49675^2 + 10188^2 .

It is a cyclic number.

It is not a de Polignac number, because 2571400969 - 2⁹ = 2571400457 is a prime.

It is a super-2 number, since 2×2571400969² = 13224205886748277922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2571400963) 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, 52302 + ... + 88759.

It is an arithmetic number, because the mean of its divisors is an integer number (642890065).

Almost surely, 2^2571400969 is an apocalyptic number.

It is an amenable number.

2571400969 is a deficient number, since it is larger than the sum of its proper divisors (159291).

2571400969 is a wasteful number, since it uses less digits than its factorization.

2571400969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159290.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 2571400969 is about 50708.9831193646. The cubic root of 2571400969 is about 1370.0085191365.

The spelling of 2571400969 in words is "two billion, five hundred seventy-one million, four hundred thousand, nine hundred sixty-nine".