521412500 has 144 divisors (see below), whose sum is σ = 1338664320. Its totient is φ = 174000000.

The previous prime is 521412499. The next prime is 521412511. The reversal of 521412500 is 5214125.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5162450 + ... + 5162550.

It is an arithmetic number, because the mean of its divisors is an integer number (9296280).

Almost surely, 2^521412500 is an apocalyptic number.

521412500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521412500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669332160).

521412500 is an abundant number, since it is smaller than the sum of its proper divisors (817251820).

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

521412500 is a wasteful number, since it uses less digits than its factorization.

521412500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 521412500 is about 22834.4586097415. The cubic root of 521412500 is about 804.8726056393.

Adding to 521412500 its reverse (5214125), we get a palindrome (526626625).

521412500 divided by its reverse (5214125) gives a square (100 = 10²).

The spelling of 521412500 in words is "five hundred twenty-one million, four hundred twelve thousand, five hundred".