521250253 has 4 divisors (see below), whose sum is σ = 524371680. Its totient is φ = 518128828.

The previous prime is 521250241. The next prime is 521250259. The reversal of 521250253 is 352052125.

It is a happy number.

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 521250253 - 2⁵ = 521250221 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 (521250259) 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, 1560463 + ... + 1560796.

It is an arithmetic number, because the mean of its divisors is an integer number (131092920).

Almost surely, 2^521250253 is an apocalyptic number.

It is an amenable number.

521250253 is a deficient number, since it is larger than the sum of its proper divisors (3121427).

521250253 is a wasteful number, since it uses less digits than its factorization.

521250253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121426.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 521250253 is about 22830.9056543975. The cubic root of 521250253 is about 804.7891133864.

The spelling of 521250253 in words is "five hundred twenty-one million, two hundred fifty thousand, two hundred fifty-three".