253712661 has 8 divisors (see below), whose sum is σ = 338367744. Its totient is φ = 169099680.

The previous prime is 253712659. The next prime is 253712671. The reversal of 253712661 is 166217352.

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

It is not a de Polignac number, because 253712661 - 2¹ = 253712659 is a prime.

It is a super-2 number, since 2×253712661² = 128740228703401842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253712611) 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, 8401 + ... + 24041.

It is an arithmetic number, because the mean of its divisors is an integer number (42295968).

Almost surely, 2^253712661 is an apocalyptic number.

It is an amenable number.

253712661 is a deficient number, since it is larger than the sum of its proper divisors (84655083).

253712661 is a wasteful number, since it uses less digits than its factorization.

253712661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21051.

The product of its digits is 15120, while the sum is 33.

The square root of 253712661 is about 15928.3602734243. The cubic root of 253712661 is about 633.0636539439.

The spelling of 253712661 in words is "two hundred fifty-three million, seven hundred twelve thousand, six hundred sixty-one".