215849015140 has 24 divisors (see below), whose sum is σ = 494490471552. Its totient is φ = 78490550880.

The previous prime is 215849015119. The next prime is 215849015141. The reversal of 215849015140 is 41510948512.

It is a junction number, because it is equal to n+sod(n) for n = 215849015093 and 215849015102.

It is not an unprimeable number, because it can be changed into a prime (215849015141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490565724 + ... + 490566163.

It is an arithmetic number, because the mean of its divisors is an integer number (20603769648).

Almost surely, 2^215849015140 is an apocalyptic number.

215849015140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215849015140 is an abundant number, since it is smaller than the sum of its proper divisors (278641456412).

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

215849015140 is a wasteful number, since it uses less digits than its factorization.

215849015140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981131907 (or 981131905 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 215849015140 in words is "two hundred fifteen billion, eight hundred forty-nine million, fifteen thousand, one hundred forty".