521126016 has 64 divisors (see below), whose sum is σ = 1388693280. Its totient is φ = 173150208.

The previous prime is 521125999. The next prime is 521126017. The reversal of 521126016 is 610621125.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is not an unprimeable number, because it can be changed into a prime (521126017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127395 + ... + 131421.

Almost surely, 2^521126016 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 521126016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694346640).

521126016 is an abundant number, since it is smaller than the sum of its proper divisors (867567264).

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

521126016 is a wasteful number, since it uses less digits than its factorization.

521126016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381 (or 4369 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 521126016 is about 22828.1846847269. The cubic root of 521126016 is about 804.7251693537.

The spelling of 521126016 in words is "five hundred twenty-one million, one hundred twenty-six thousand, sixteen".