522873721 has 2 divisors, whose sum is σ = 522873722. Its totient is φ = 522873720.

The previous prime is 522873707. The next prime is 522873727. The reversal of 522873721 is 127378225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278389225 + 244484496 = 16685^2 + 15636^2 .

It is a cyclic number.

It is not a de Polignac number, because 522873721 - 2⁹ = 522873209 is a prime.

It is a super-2 number, since 2×522873721² = 546793856224771682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (522873727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261436860 + 261436861.

It is an arithmetic number, because the mean of its divisors is an integer number (261436861).

Almost surely, 2^522873721 is an apocalyptic number.

It is an amenable number.

522873721 is a deficient number, since it is larger than the sum of its proper divisors (1).

522873721 is an equidigital number, since it uses as much as digits as its factorization.

522873721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 522873721 is about 22866.4321878163. The cubic root of 522873721 is about 805.6237702283.

The spelling of 522873721 in words is "five hundred twenty-two million, eight hundred seventy-three thousand, seven hundred twenty-one".