521625104 has 80 divisors (see below), whose sum is σ = 1356996480. Its totient is φ = 187591680.

The previous prime is 521625079. The next prime is 521625133. The reversal of 521625104 is 401526125.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269 + ... + 32300.

It is an arithmetic number, because the mean of its divisors is an integer number (16962456).

Almost surely, 2^521625104 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 521625104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678498240).

521625104 is an abundant number, since it is smaller than the sum of its proper divisors (835371376).

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

521625104 is a wasteful number, since it uses less digits than its factorization.

521625104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32608 (or 32602 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 521625104 is about 22839.1134679085. The cubic root of 521625104 is about 804.9819853742.

The spelling of 521625104 in words is "five hundred twenty-one million, six hundred twenty-five thousand, one hundred four".