315531421500000 has 336 divisors, whose sum is σ = 1057352635713024. Its totient is φ = 82351444800000.

The previous prime is 315531421499989. The next prime is 315531421500017. The reversal of 315531421500000 is 5124135513.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 68262189 + ... + 72737811.

It is an arithmetic number, because the mean of its divisors is an integer number (3146882844384).

Almost surely, 2^{315531421500000} is an apocalyptic number.

315531421500000 is a gapful number since it is divisible by the number (30) 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 315531421500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528676317856512).

315531421500000 is an abundant number, since it is smaller than the sum of its proper divisors (741821214213024).

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

315531421500000 is an frugal number, since it uses more digits than its factorization.

315531421500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475713 (or 4475680 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 315531421500000 its reverse (5124135513), we get a palindrome (315536545635513).

The spelling of 315531421500000 in words is "three hundred fifteen trillion, five hundred thirty-one billion, four hundred twenty-one million, five hundred thousand".