521023049 has 4 divisors (see below), whose sum is σ = 522398160. Its totient is φ = 519647940.

The previous prime is 521023043. The next prime is 521023103. The reversal of 521023049 is 940320125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521023049 - 2⁴ = 521023033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521023043) 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, 686987 + ... + 687744.

It is an arithmetic number, because the mean of its divisors is an integer number (130599540).

Almost surely, 2^521023049 is an apocalyptic number.

It is an amenable number.

521023049 is a deficient number, since it is larger than the sum of its proper divisors (1375111).

521023049 is a wasteful number, since it uses less digits than its factorization.

521023049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375110.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 521023049 is about 22825.9293129546. The cubic root of 521023049 is about 804.6721651590.

The spelling of 521023049 in words is "five hundred twenty-one million, twenty-three thousand, forty-nine".