215093940 has 48 divisors (see below), whose sum is σ = 612480960. Its totient is φ = 56385280.

The previous prime is 215093909. The next prime is 215093941. The reversal of 215093940 is 49390512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215093941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26841 + ... + 33920.

It is an arithmetic number, because the mean of its divisors is an integer number (12760020).

Almost surely, 2^215093940 is an apocalyptic number.

215093940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215093940 is an abundant number, since it is smaller than the sum of its proper divisors (397387020).

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

215093940 is a wasteful number, since it uses less digits than its factorization.

215093940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60832 (or 60830 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 215093940 is about 14666.0812761964. The cubic root of 215093940 is about 599.1598797679.

The spelling of 215093940 in words is "two hundred fifteen million, ninety-three thousand, nine hundred forty".