521231330252 has 48 divisors (see below), whose sum is σ = 966903648480. Its totient is φ = 245170598400.

The previous prime is 521231330239. The next prime is 521231330393. The reversal of 521231330252 is 252033132125.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7767002 + ... + 7833822.

It is an arithmetic number, because the mean of its divisors is an integer number (20143826010).

Almost surely, 2^521231330252 is an apocalyptic number.

It is an amenable number.

521231330252 is a deficient number, since it is larger than the sum of its proper divisors (445672318228).

521231330252 is a wasteful number, since it uses less digits than its factorization.

521231330252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67562 (or 67560 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

Adding to 521231330252 its reverse (252033132125), we get a palindrome (773264462377).

The spelling of 521231330252 in words is "five hundred twenty-one billion, two hundred thirty-one million, three hundred thirty thousand, two hundred fifty-two".