8525197257 has 4 divisors (see below), whose sum is σ = 11366929680. Its totient is φ = 5683464836.

The previous prime is 8525197249. The next prime is 8525197259. The reversal of 8525197257 is 7527915258.

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 8525197257 - 2³ = 8525197249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8525197259) 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, 1420866207 + ... + 1420866212.

It is an arithmetic number, because the mean of its divisors is an integer number (2841732420).

Almost surely, 2^8525197257 is an apocalyptic number.

It is an amenable number.

8525197257 is a deficient number, since it is larger than the sum of its proper divisors (2841732423).

8525197257 is a wasteful number, since it uses less digits than its factorization.

8525197257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841732422.

The product of its digits is 1764000, while the sum is 51.

The square root of 8525197257 is about 92331.9947634621. The cubic root of 8525197257 is about 2042.8421598632.

The spelling of 8525197257 in words is "eight billion, five hundred twenty-five million, one hundred ninety-seven thousand, two hundred fifty-seven".