215245500240 has 160 divisors (see below), whose sum is σ = 681502631040. Its totient is φ = 56186431488.

The previous prime is 215245500227. The next prime is 215245500251. The reversal of 215245500240 is 42005542512.

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

It is a junction number, because it is equal to n+sod(n) for n = 215245500198 and 215245500207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2121714 + ... + 2220846.

It is an arithmetic number, because the mean of its divisors is an integer number (4259391444).

Almost surely, 2^215245500240 is an apocalyptic number.

215245500240 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 215245500240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340751315520).

215245500240 is an abundant number, since it is smaller than the sum of its proper divisors (466257130800).

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

215245500240 is a wasteful number, since it uses less digits than its factorization.

215245500240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99341 (or 99335 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 215245500240 in words is "two hundred fifteen billion, two hundred forty-five million, five hundred thousand, two hundred forty".