253257623 has 4 divisors (see below), whose sum is σ = 264268848. Its totient is φ = 242246400.

The previous prime is 253257611. The next prime is 253257629. The reversal of 253257623 is 326752352.

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 253257623 - 2²⁰ = 252209047 is a prime.

It is a super-2 number, since 2×253257623² = 128278847215220258, 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 (253257629) 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, 5505578 + ... + 5505623.

It is an arithmetic number, because the mean of its divisors is an integer number (66067212).

Almost surely, 2^253257623 is an apocalyptic number.

253257623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

253257623 is a deficient number, since it is larger than the sum of its proper divisors (11011225).

253257623 is a wasteful number, since it uses less digits than its factorization.

253257623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011224.

The product of its digits is 75600, while the sum is 35.

The square root of 253257623 is about 15914.0699696841. The cubic root of 253257623 is about 632.6849572876.

The spelling of 253257623 in words is "two hundred fifty-three million, two hundred fifty-seven thousand, six hundred twenty-three".