215140144920 has 64 divisors (see below), whose sum is σ = 651452440320. Its totient is φ = 56834527104.

The previous prime is 215140144883. The next prime is 215140144939. The reversal of 215140144920 is 29441041512.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8364892 + ... + 8390571.

It is an arithmetic number, because the mean of its divisors is an integer number (10178944380).

Almost surely, 2^215140144920 is an apocalyptic number.

215140144920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215140144920 is an abundant number, since it is smaller than the sum of its proper divisors (436312295400).

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

215140144920 is a wasteful number, since it uses less digits than its factorization.

215140144920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16755584 (or 16755580 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 215140144920 in words is "two hundred fifteen billion, one hundred forty million, one hundred forty-four thousand, nine hundred twenty".