253157865 has 8 divisors (see below), whose sum is σ = 405052608. Its totient is φ = 135017520.

The previous prime is 253157857. The next prime is 253157867. The reversal of 253157865 is 568751352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253157865 - 2³ = 253157857 is a prime.

It is a super-2 number, since 2×253157865² = 128177809222716450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253157867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8438581 + ... + 8438610.

It is an arithmetic number, because the mean of its divisors is an integer number (50631576).

Almost surely, 2^253157865 is an apocalyptic number.

It is an amenable number.

253157865 is a deficient number, since it is larger than the sum of its proper divisors (151894743).

253157865 is a wasteful number, since it uses less digits than its factorization.

253157865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16877199.

The product of its digits is 252000, while the sum is 42.

The square root of 253157865 is about 15910.9353904791. The cubic root of 253157865 is about 632.6018749911.

The spelling of 253157865 in words is "two hundred fifty-three million, one hundred fifty-seven thousand, eight hundred sixty-five".