512972279221 has 2 divisors, whose sum is σ = 512972279222. Its totient is φ = 512972279220.

The previous prime is 512972279189. The next prime is 512972279231. The reversal of 512972279221 is 122972279215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480402858321 + 32569420900 = 693111^2 + 180470^2 .

It is a cyclic number.

It is not a de Polignac number, because 512972279221 - 2⁵ = 512972279189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512972279231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256486139610 + 256486139611.

It is an arithmetic number, because the mean of its divisors is an integer number (256486139611).

Almost surely, 2^512972279221 is an apocalyptic number.

It is an amenable number.

512972279221 is a deficient number, since it is larger than the sum of its proper divisors (1).

512972279221 is an equidigital number, since it uses as much as digits as its factorization.

512972279221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The spelling of 512972279221 in words is "five hundred twelve billion, nine hundred seventy-two million, two hundred seventy-nine thousand, two hundred twenty-one".