215033240 has 16 divisors (see below), whose sum is σ = 483824880. Its totient is φ = 86013280.

The previous prime is 215033219. The next prime is 215033251. The reversal of 215033240 is 42330512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 2687876 + ... + 2687955.

It is an arithmetic number, because the mean of its divisors is an integer number (30239055).

Almost surely, 2^215033240 is an apocalyptic number.

215033240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215033240 is an abundant number, since it is smaller than the sum of its proper divisors (268791640).

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

215033240 is a wasteful number, since it uses less digits than its factorization.

215033240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5375842 (or 5375838 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 215033240 is about 14664.0117294007. The cubic root of 215033240 is about 599.1035130375.

Adding to 215033240 its reverse (42330512), we get a palindrome (257363752).

The spelling of 215033240 in words is "two hundred fifteen million, thirty-three thousand, two hundred forty".