521053331 has 4 divisors (see below), whose sum is σ = 521275464. Its totient is φ = 520831200.

The previous prime is 521053307. The next prime is 521053361. The reversal of 521053331 is 133350125.

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 521053331 - 2¹⁴ = 521036947 is a prime.

It is a super-2 number, since 2×521053331² = 542993147492391122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521053297 and 521053306.

It is not an unprimeable number, because it can be changed into a prime (521053361) 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, 107510 + ... + 112251.

It is an arithmetic number, because the mean of its divisors is an integer number (130318866).

Almost surely, 2^521053331 is an apocalyptic number.

521053331 is a deficient number, since it is larger than the sum of its proper divisors (222133).

521053331 is a wasteful number, since it uses less digits than its factorization.

521053331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222132.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 521053331 is about 22826.5926278978. The cubic root of 521053331 is about 804.6877541113.

The spelling of 521053331 in words is "five hundred twenty-one million, fifty-three thousand, three hundred thirty-one".