521655052 has 12 divisors (see below), whose sum is σ = 913144960. Its totient is φ = 260756496.

The previous prime is 521654993. The next prime is 521655053. The reversal of 521655052 is 250556125.

It is not an unprimeable number, because it can be changed into a prime (521655053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958 + ... + 32314.

Almost surely, 2^521655052 is an apocalyptic number.

It is an amenable number.

521655052 is a deficient number, since it is larger than the sum of its proper divisors (391489908).

521655052 is a wasteful number, since it uses less digits than its factorization.

521655052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35520 (or 35518 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 521655052 is about 22839.7690881497. The cubic root of 521655052 is about 804.9973905243.

The spelling of 521655052 in words is "five hundred twenty-one million, six hundred fifty-five thousand, fifty-two".