253474521 has 4 divisors (see below), whose sum is σ = 337966032. Its totient is φ = 168983012.

The previous prime is 253474519. The next prime is 253474537. The reversal of 253474521 is 125474352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 253474521 - 2¹ = 253474519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253470521) 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, 42245751 + ... + 42245756.

It is an arithmetic number, because the mean of its divisors is an integer number (84491508).

Almost surely, 2^253474521 is an apocalyptic number.

It is an amenable number.

253474521 is a deficient number, since it is larger than the sum of its proper divisors (84491511).

253474521 is an equidigital number, since it uses as much as digits as its factorization.

253474521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84491510.

The product of its digits is 33600, while the sum is 33.

The square root of 253474521 is about 15920.8831727389. The cubic root of 253474521 is about 632.8655230206.

The spelling of 253474521 in words is "two hundred fifty-three million, four hundred seventy-four thousand, five hundred twenty-one".