215150440 has 32 divisors (see below), whose sum is σ = 484888680. Its totient is φ = 85917952.

The previous prime is 215150437. The next prime is 215150461. The reversal of 215150440 is 44051512.

It can be written as a sum of positive squares in 4 ways, for example, as 158810404 + 56340036 = 12602^2 + 7506^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22002 + ... + 30238.

Almost surely, 2^215150440 is an apocalyptic number.

215150440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215150440 is an abundant number, since it is smaller than the sum of its proper divisors (269738240).

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

215150440 is a wasteful number, since it uses less digits than its factorization.

215150440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901 (or 8897 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 215150440 is about 14668.0073629652. The cubic root of 215150440 is about 599.2123368007.

The spelling of 215150440 in words is "two hundred fifteen million, one hundred fifty thousand, four hundred forty".