521380834 has 8 divisors (see below), whose sum is σ = 842230620. Its totient is φ = 240637296.

The previous prime is 521380831. The next prime is 521380841. The reversal of 521380834 is 438083125.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 502432225 + 18948609 = 22415^2 + 4353^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 521380834.

It is not an unprimeable number, because it can be changed into a prime (521380831) 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, 10026529 + ... + 10026580.

Almost surely, 2^521380834 is an apocalyptic number.

521380834 is a deficient number, since it is larger than the sum of its proper divisors (320849786).

521380834 is a wasteful number, since it uses less digits than its factorization.

521380834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20053124.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 521380834 is about 22833.7652173267. The cubic root of 521380834 is about 804.8563116866.

The spelling of 521380834 in words is "five hundred twenty-one million, three hundred eighty thousand, eight hundred thirty-four".