253041521 has 4 divisors (see below), whose sum is σ = 253525872. Its totient is φ = 252557172.

The previous prime is 253041497. The next prime is 253041533. The reversal of 253041521 is 125140352.

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 253041521 - 2¹⁸ = 252779377 is a prime.

It is a super-4 number, since 4×253041521⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253041571) 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, 241391 + ... + 242436.

It is an arithmetic number, because the mean of its divisors is an integer number (63381468).

Almost surely, 2^253041521 is an apocalyptic number.

It is an amenable number.

253041521 is a deficient number, since it is larger than the sum of its proper divisors (484351).

253041521 is an equidigital number, since it uses as much as digits as its factorization.

253041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484350.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 253041521 is about 15907.2788684929. The cubic root of 253041521 is about 632.5049516607.

Adding to 253041521 its reverse (125140352), we get a palindrome (378181873).

The spelling of 253041521 in words is "two hundred fifty-three million, forty-one thousand, five hundred twenty-one".