253666523 has 8 divisors (see below), whose sum is σ = 276842496. Its totient is φ = 230509800.

The previous prime is 253666519. The next prime is 253666531. The reversal of 253666523 is 325666352.

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

It is a cyclic number.

It is not a de Polignac number, because 253666523 - 2² = 253666519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253666573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47990 + ... + 53012.

It is an arithmetic number, because the mean of its divisors is an integer number (34605312).

Almost surely, 2^253666523 is an apocalyptic number.

253666523 is a deficient number, since it is larger than the sum of its proper divisors (23175973).

253666523 is a wasteful number, since it uses less digits than its factorization.

253666523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9625.

The product of its digits is 194400, while the sum is 38.

The square root of 253666523 is about 15926.9119103485. The cubic root of 253666523 is about 633.0252771157.

The spelling of 253666523 in words is "two hundred fifty-three million, six hundred sixty-six thousand, five hundred twenty-three".