522261668 has 6 divisors (see below), whose sum is σ = 913957926. Its totient is φ = 261130832.

The previous prime is 522261661. The next prime is 522261739. The reversal of 522261668 is 866162225.

It can be written as a sum of positive squares in only one way, i.e., 392119204 + 130142464 = 19802^2 + 11408^2 .

It is not an unprimeable number, because it can be changed into a prime (522261661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65282705 + ... + 65282712.

It is an arithmetic number, because the mean of its divisors is an integer number (152326321).

Almost surely, 2^522261668 is an apocalyptic number.

It is an amenable number.

522261668 is a deficient number, since it is larger than the sum of its proper divisors (391696258).

522261668 is a wasteful number, since it uses less digits than its factorization.

522261668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130565421 (or 130565419 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 522261668 is about 22853.0450487457. The cubic root of 522261668 is about 805.3093049026.

The spelling of 522261668 in words is "five hundred twenty-two million, two hundred sixty-one thousand, six hundred sixty-eight".