521347834 has 16 divisors (see below), whose sum is σ = 917895168. Its totient is φ = 217395792.

The previous prime is 521347811. The next prime is 521347847. The reversal of 521347834 is 438743125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 521347793 and 521347802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502714 + ... + 503749.

It is an arithmetic number, because the mean of its divisors is an integer number (57368448).

Almost surely, 2^521347834 is an apocalyptic number.

521347834 is a deficient number, since it is larger than the sum of its proper divisors (396547334).

521347834 is a wasteful number, since it uses less digits than its factorization.

521347834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006509.

The product of its digits is 80640, while the sum is 37.

The square root of 521347834 is about 22833.0425918229. The cubic root of 521347834 is about 804.8393306132.

The spelling of 521347834 in words is "five hundred twenty-one million, three hundred forty-seven thousand, eight hundred thirty-four".