521372300000 has 144 divisors (see below), whose sum is σ = 1284113748960. Its totient is φ = 208365120000.

The previous prime is 521372299969. The next prime is 521372300003. The reversal of 521372300000 is 3273125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521372300003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203898722 + ... + 203901278.

It is an arithmetic number, because the mean of its divisors is an integer number (8917456590).

Almost surely, 2^521372300000 is an apocalyptic number.

521372300000 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 521372300000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642056874480).

521372300000 is an abundant number, since it is smaller than the sum of its proper divisors (762741448960).

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

521372300000 is an equidigital number, since it uses as much as digits as its factorization.

521372300000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631 (or 4603 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

Adding to 521372300000 its reverse (3273125), we get a palindrome (521375573125).

The spelling of 521372300000 in words is "five hundred twenty-one billion, three hundred seventy-two million, three hundred thousand".