216015254240 has 48 divisors (see below), whose sum is σ = 510601054320. Its totient is φ = 86361231360.

The previous prime is 216015254239. The next prime is 216015254249. The reversal of 216015254240 is 42452510612.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 216015254197 and 216015254206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216015254249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40625 + ... + 658544.

It is an arithmetic number, because the mean of its divisors is an integer number (10637521965).

Almost surely, 2^216015254240 is an apocalyptic number.

216015254240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216015254240 is an abundant number, since it is smaller than the sum of its proper divisors (294585800080).

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

216015254240 is a wasteful number, since it uses less digits than its factorization.

216015254240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701115 (or 701107 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 216015254240 its reverse (42452510612), we get a palindrome (258467764852).

The spelling of 216015254240 in words is "two hundred sixteen billion, fifteen million, two hundred fifty-four thousand, two hundred forty".