521451652 has 12 divisors (see below), whose sum is σ = 931956480. Its totient is φ = 255178376.

The previous prime is 521451649. The next prime is 521451661. The reversal of 521451652 is 256154125.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386652 + ... + 1387027.

It is an arithmetic number, because the mean of its divisors is an integer number (77663040).

Almost surely, 2^521451652 is an apocalyptic number.

It is an amenable number.

521451652 is a deficient number, since it is larger than the sum of its proper divisors (410504828).

521451652 is a wasteful number, since it uses less digits than its factorization.

521451652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773730 (or 2773728 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 521451652 is about 22835.3158944649. The cubic root of 521451652 is about 804.8927506515.

The spelling of 521451652 in words is "five hundred twenty-one million, four hundred fifty-one thousand, six hundred fifty-two".