521142652 has 6 divisors (see below), whose sum is σ = 911999648. Its totient is φ = 260571324.

The previous prime is 521142649. The next prime is 521142691. The reversal of 521142652 is 256241125.

It is a self number, because there is not a number n which added to its sum of digits gives 521142652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65142828 + ... + 65142835.

Almost surely, 2^521142652 is an apocalyptic number.

It is an amenable number.

521142652 is a deficient number, since it is larger than the sum of its proper divisors (390856996).

521142652 is a wasteful number, since it uses less digits than its factorization.

521142652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130285667 (or 130285665 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 521142652 is about 22828.5490559518. The cubic root of 521142652 is about 804.7337323916.

Adding to 521142652 its reverse (256241125), we get a palindrome (777383777).

The spelling of 521142652 in words is "five hundred twenty-one million, one hundred forty-two thousand, six hundred fifty-two".