521340326 has 24 divisors (see below), whose sum is σ = 896613624. Its totient is φ = 226462080.

The previous prime is 521340317. The next prime is 521340329. The reversal of 521340326 is 623043125.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 521340295 and 521340304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521340329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39620 + ... + 51111.

It is an arithmetic number, because the mean of its divisors is an integer number (37358901).

Almost surely, 2^521340326 is an apocalyptic number.

521340326 is a deficient number, since it is larger than the sum of its proper divisors (375273298).

521340326 is a wasteful number, since it uses less digits than its factorization.

521340326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90776 (or 90763 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 521340326 is about 22832.8781803784. The cubic root of 521340326 is about 804.8354670616.

The spelling of 521340326 in words is "five hundred twenty-one million, three hundred forty thousand, three hundred twenty-six".