215392547920 has 80 divisors (see below), whose sum is σ = 548037923328. Its totient is φ = 78077381120.

The previous prime is 215392547911. The next prime is 215392547921. The reversal of 215392547920 is 29745293512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215392547921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107104 + ... + 665023.

Almost surely, 2^215392547920 is an apocalyptic number.

215392547920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215392547920 is an abundant number, since it is smaller than the sum of its proper divisors (332645375408).

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

215392547920 is a wasteful number, since it uses less digits than its factorization.

215392547920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772468 (or 772462 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 215392547920 in words is "two hundred fifteen billion, three hundred ninety-two million, five hundred forty-seven thousand, nine hundred twenty".