521053052520 has 2048 divisors, whose sum is σ = 2332650700800. Its totient is φ = 89535283200.

The previous prime is 521053052519. The next prime is 521053052539. The reversal of 521053052520 is 25250350125.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 5854528636 + ... + 5854528724.

It is an arithmetic number, because the mean of its divisors is an integer number (1138989600).

Almost surely, 2^521053052520 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 521053052520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1166325350400).

521053052520 is an abundant number, since it is smaller than the sum of its proper divisors (1811597648280).

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

521053052520 is a wasteful number, since it uses less digits than its factorization.

521053052520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 521053052520 in words is "five hundred twenty-one billion, fifty-three million, fifty-two thousand, five hundred twenty".