215237440000 has 400 divisors, whose sum is σ = 599183899776. Its totient is φ = 76544000000.

The previous prime is 215237439997. The next prime is 215237440007. The reversal of 215237440000 is 44732512.

It is a tau number, because it is divible by the number of its divisors (400).

It is not an unprimeable number, because it can be changed into a prime (215237440007) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 165439350 + ... + 165440650.

Almost surely, 2^215237440000 is an apocalyptic number.

215237440000 is a gapful number since it is divisible by the number (20) 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 215237440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299591949888).

215237440000 is an abundant number, since it is smaller than the sum of its proper divisors (383946459776).

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

215237440000 is an equidigital number, since it uses as much as digits as its factorization.

215237440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The spelling of 215237440000 in words is "two hundred fifteen billion, two hundred thirty-seven million, four hundred forty thousand".