215040140 has 48 divisors (see below), whose sum is σ = 546460992. Its totient is φ = 69390336.

The previous prime is 215040139. The next prime is 215040151. The reversal of 215040140 is 41040512.

It is a super-2 number, since 2×215040140² = 92484523622439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42797 + ... + 47556.

It is an arithmetic number, because the mean of its divisors is an integer number (11384604).

Almost surely, 2^215040140 is an apocalyptic number.

215040140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215040140 is an abundant number, since it is smaller than the sum of its proper divisors (331420852).

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

215040140 is a wasteful number, since it uses less digits than its factorization.

215040140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90386 (or 90384 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 215040140 is about 14664.2469973743. The cubic root of 215040140 is about 599.1099209926.

Adding to 215040140 its reverse (41040512), we get a palindrome (256080652).

The spelling of 215040140 in words is "two hundred fifteen million, forty thousand, one hundred forty".