215250340 has 24 divisors (see below), whose sum is σ = 454305600. Its totient is φ = 85665888.

The previous prime is 215250337. The next prime is 215250341. The reversal of 215250340 is 43052512.

215250340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (215250341) 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, 23062 + ... + 31021.

It is an arithmetic number, because the mean of its divisors is an integer number (18929400).

Almost surely, 2^215250340 is an apocalyptic number.

215250340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215250340 is an abundant number, since it is smaller than the sum of its proper divisors (239055260).

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

215250340 is a wasteful number, since it uses less digits than its factorization.

215250340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54291 (or 54289 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 215250340 is about 14671.4123382856. The cubic root of 215250340 is about 599.3050657919.

The spelling of 215250340 in words is "two hundred fifteen million, two hundred fifty thousand, three hundred forty".