521251053 has 16 divisors (see below), whose sum is σ = 702474240. Its totient is φ = 343780416.

The previous prime is 521251037. The next prime is 521251061. The reversal of 521251053 is 350152125.

It is a happy number.

It is not a de Polignac number, because 521251053 - 2⁴ = 521251037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521251063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146451 + ... + 149967.

It is an arithmetic number, because the mean of its divisors is an integer number (43904640).

Almost surely, 2^521251053 is an apocalyptic number.

It is an amenable number.

521251053 is a deficient number, since it is larger than the sum of its proper divisors (181223187).

521251053 is a wasteful number, since it uses less digits than its factorization.

521251053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 521251053 is about 22830.9231745017. The cubic root of 521251053 is about 804.7895251086.

It can be divided in two parts, 5212 and 51053, that added together give a palindrome (56265).

The spelling of 521251053 in words is "five hundred twenty-one million, two hundred fifty-one thousand, fifty-three".