521307061 has 4 divisors (see below), whose sum is σ = 568698624. Its totient is φ = 473915500.

The previous prime is 521307041. The next prime is 521307071. The reversal of 521307061 is 160703125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521307061 - 2¹⁷ = 521175989 is a prime.

It is a super-2 number, since 2×521307061² = 543522103696915442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521307011) 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, 23695765 + ... + 23695786.

It is an arithmetic number, because the mean of its divisors is an integer number (142174656).

Almost surely, 2^521307061 is an apocalyptic number.

It is an amenable number.

521307061 is a deficient number, since it is larger than the sum of its proper divisors (47391563).

521307061 is a wasteful number, since it uses less digits than its factorization.

521307061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47391562.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 521307061 is about 22832.1497235806. The cubic root of 521307061 is about 804.8183487354.

The spelling of 521307061 in words is "five hundred twenty-one million, three hundred seven thousand, sixty-one".