523250921 has 2 divisors, whose sum is σ = 523250922. Its totient is φ = 523250920.

The previous prime is 523250887. The next prime is 523250947. The reversal of 523250921 is 129052325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516925696 + 6325225 = 22736^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 523250921 - 2¹⁰ = 523249897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (523250951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261625460 + 261625461.

It is an arithmetic number, because the mean of its divisors is an integer number (261625461).

Almost surely, 2^523250921 is an apocalyptic number.

It is an amenable number.

523250921 is a deficient number, since it is larger than the sum of its proper divisors (1).

523250921 is an equidigital number, since it uses as much as digits as its factorization.

523250921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 523250921 is about 22874.6785988350. The cubic root of 523250921 is about 805.8174487592.

The spelling of 523250921 in words is "five hundred twenty-three million, two hundred fifty thousand, nine hundred twenty-one".