521116734 has 8 divisors (see below), whose sum is σ = 1042233480. Its totient is φ = 173705576.

The previous prime is 521116709. The next prime is 521116763. The reversal of 521116734 is 437611125.

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

521116734 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43426389 + ... + 43426400.

It is an arithmetic number, because the mean of its divisors is an integer number (130279185).

Almost surely, 2^521116734 is an apocalyptic number.

521116734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521116734 is a wasteful number, since it uses less digits than its factorization.

521116734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86852794.

The product of its digits is 5040, while the sum is 30.

The square root of 521116734 is about 22827.9813825051. The cubic root of 521116734 is about 804.7203915564.

Adding to 521116734 its reverse (437611125), we get a palindrome (958727859).

It can be divided in two parts, 5211 and 16734, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 521116734 in words is "five hundred twenty-one million, one hundred sixteen thousand, seven hundred thirty-four".