253685567 has 4 divisors (see below), whose sum is σ = 253829160. Its totient is φ = 253541976.

The previous prime is 253685563. The next prime is 253685581. The reversal of 253685567 is 765586352.

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

It is a cyclic number.

It is not a de Polignac number, because 253685567 - 2² = 253685563 is a prime.

It is a super-2 number, since 2×253685567² = 128712733808222978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253685563) 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, 69113 + ... + 72690.

It is an arithmetic number, because the mean of its divisors is an integer number (63457290).

Almost surely, 2^253685567 is an apocalyptic number.

253685567 is a deficient number, since it is larger than the sum of its proper divisors (143593).

253685567 is a wasteful number, since it uses less digits than its factorization.

253685567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143592.

The product of its digits is 1512000, while the sum is 47.

The square root of 253685567 is about 15927.5097551375. The cubic root of 253685567 is about 633.0411181650.

The spelling of 253685567 in words is "two hundred fifty-three million, six hundred eighty-five thousand, five hundred sixty-seven".