521368061 has 8 divisors (see below), whose sum is σ = 539632800. Its totient is φ = 503122480.

The previous prime is 521368027. The next prime is 521368063. The reversal of 521368061 is 160863125.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521368061 - 2²² = 517173757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521368063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71306 + ... + 78276.

It is an arithmetic number, because the mean of its divisors is an integer number (67454100).

Almost surely, 2^521368061 is an apocalyptic number.

It is an amenable number.

521368061 is a deficient number, since it is larger than the sum of its proper divisors (18264739).

521368061 is a wasteful number, since it uses less digits than its factorization.

521368061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 521368061 is about 22833.4855201741. The cubic root of 521368061 is about 804.8497390670.

The spelling of 521368061 in words is "five hundred twenty-one million, three hundred sixty-eight thousand, sixty-one".