521363040 has 192 divisors, whose sum is σ = 1886250240. Its totient is φ = 119715840.

The previous prime is 521363039. The next prime is 521363071. The reversal of 521363040 is 40363125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 521363040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97722 + ... + 102918.

It is an arithmetic number, because the mean of its divisors is an integer number (9824220).

Almost surely, 2^521363040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521363040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943125120).

521363040 is an abundant number, since it is smaller than the sum of its proper divisors (1364887200).

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

521363040 is a wasteful number, since it uses less digits than its factorization.

521363040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245 (or 5237 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 521363040 is about 22833.3755717371. The cubic root of 521363040 is about 804.8471553750.

The spelling of 521363040 in words is "five hundred twenty-one million, three hundred sixty-three thousand, forty".