521265023 has 4 divisors (see below), whose sum is σ = 525369600. Its totient is φ = 517160448.

The previous prime is 521265007. The next prime is 521265083. The reversal of 521265023 is 320562125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521265023 - 2⁴ = 521265007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521264983 and 521265001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521265083) 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, 2052098 + ... + 2052351.

It is an arithmetic number, because the mean of its divisors is an integer number (131342400).

Almost surely, 2^521265023 is an apocalyptic number.

521265023 is a deficient number, since it is larger than the sum of its proper divisors (4104577).

521265023 is a wasteful number, since it uses less digits than its factorization.

521265023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4104576.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 521265023 is about 22831.2291171544. The cubic root of 521265023 is about 804.7967147403.

The spelling of 521265023 in words is "five hundred twenty-one million, two hundred sixty-five thousand, twenty-three".