253404253 has 4 divisors (see below), whose sum is σ = 255913308. Its totient is φ = 250895200.

The previous prime is 253404209. The next prime is 253404269. The reversal of 253404253 is 352404352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186131449 + 67272804 = 13643^2 + 8202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253404253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253404353) 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, 1254376 + ... + 1254577.

It is an arithmetic number, because the mean of its divisors is an integer number (63978327).

Almost surely, 2^253404253 is an apocalyptic number.

It is an amenable number.

253404253 is a deficient number, since it is larger than the sum of its proper divisors (2509055).

253404253 is a wasteful number, since it uses less digits than its factorization.

253404253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509054.

The product of its (nonzero) digits is 14400, while the sum is 28.

The square root of 253404253 is about 15918.6762326520. The cubic root of 253404253 is about 632.8070367944.

Subtracting 253404253 from its reverse (352404352), we obtain a palindrome (99000099).

The spelling of 253404253 in words is "two hundred fifty-three million, four hundred four thousand, two hundred fifty-three".