521703113 has 4 divisors (see below), whose sum is σ = 522728580. Its totient is φ = 520677648.

The previous prime is 521703107. The next prime is 521703163. The reversal of 521703113 is 311307125.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219395344 + 302307769 = 14812^2 + 17387^2 .

It is a cyclic number.

It is not a de Polignac number, because 521703113 - 2¹⁰ = 521702089 is a prime.

It is a super-2 number, since 2×521703113² = 544348276227781538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521703163) 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, 511970 + ... + 512987.

It is an arithmetic number, because the mean of its divisors is an integer number (130682145).

Almost surely, 2^521703113 is an apocalyptic number.

It is an amenable number.

521703113 is a deficient number, since it is larger than the sum of its proper divisors (1025467).

521703113 is a wasteful number, since it uses less digits than its factorization.

521703113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025466.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 521703113 is about 22840.8211980218. The cubic root of 521703113 is about 805.0221117083.

The spelling of 521703113 in words is "five hundred twenty-one million, seven hundred three thousand, one hundred thirteen".