521230572 has 144 divisors (see below), whose sum is σ = 1478584800. Its totient is φ = 158578560.

The previous prime is 521230561. The next prime is 521230607. The reversal of 521230572 is 275032125.

521230572 is a `hidden beast` number, since 52 + 12 + 30 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1130422 + ... + 1130882.

It is an arithmetic number, because the mean of its divisors is an integer number (10267950).

Almost surely, 2^521230572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521230572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739292400).

521230572 is an abundant number, since it is smaller than the sum of its proper divisors (957354228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521230572 is a wasteful number, since it uses less digits than its factorization.

521230572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 521230572 is about 22830.4746336996. The cubic root of 521230572 is about 804.7789843721.

Adding to 521230572 its reverse (275032125), we get a palindrome (796262697).

The spelling of 521230572 in words is "five hundred twenty-one million, two hundred thirty thousand, five hundred seventy-two".