215243007880 has 32 divisors (see below), whose sum is σ = 484510037400. Its totient is φ = 86059288576.

The previous prime is 215243007871. The next prime is 215243007887. The reversal of 215243007880 is 88700342512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 212331110436 + 2911897444 = 460794^2 + 53962^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (215243007887) 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, 1092775 + ... + 1274614.

Almost surely, 2^215243007880 is an apocalyptic number.

215243007880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215243007880 is an abundant number, since it is smaller than the sum of its proper divisors (269267029520).

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

215243007880 is a wasteful number, since it uses less digits than its factorization.

215243007880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369673 (or 2369669 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 215243007880 in words is "two hundred fifteen billion, two hundred forty-three million, seven thousand, eight hundred eighty".