522040991 has 2 divisors, whose sum is σ = 522040992. Its totient is φ = 522040990.

The previous prime is 522040963. The next prime is 522041021. The reversal of 522040991 is 199040225.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522040991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522040901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261020495 + 261020496.

It is an arithmetic number, because the mean of its divisors is an integer number (261020496).

Almost surely, 2^522040991 is an apocalyptic number.

522040991 is a deficient number, since it is larger than the sum of its proper divisors (1).

522040991 is an equidigital number, since it uses as much as digits as its factorization.

522040991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 522040991 is about 22848.2163636464. The cubic root of 522040991 is about 805.1958635068.

The spelling of 522040991 in words is "five hundred twenty-two million, forty thousand, nine hundred ninety-one".