215763980 has 12 divisors (see below), whose sum is σ = 453104400. Its totient is φ = 86305584.

The previous prime is 215763979. The next prime is 215763997. The reversal of 215763980 is 89367512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5394080 + ... + 5394119.

It is an arithmetic number, because the mean of its divisors is an integer number (37758700).

Almost surely, 2^215763980 is an apocalyptic number.

215763980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215763980 is an abundant number, since it is smaller than the sum of its proper divisors (237340420).

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

215763980 is a wasteful number, since it uses less digits than its factorization.

215763980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10788208 (or 10788206 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 215763980 is about 14688.9066985940. The cubic root of 215763980 is about 599.7813833172.

The spelling of 215763980 in words is "two hundred fifteen million, seven hundred sixty-three thousand, nine hundred eighty".