215010040 has 96 divisors (see below), whose sum is σ = 567049680. Its totient is φ = 73156608.

The previous prime is 215010011. The next prime is 215010041. The reversal of 215010040 is 40010512.

215010040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 215010040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215010041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 319144 + ... + 319816.

Almost surely, 2^215010040 is an apocalyptic number.

215010040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215010040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283524840).

215010040 is an abundant number, since it is smaller than the sum of its proper divisors (352039640).

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

215010040 is a wasteful number, since it uses less digits than its factorization.

215010040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 215010040 is about 14663.2206557768. The cubic root of 215010040 is about 599.0819664441.

Adding to 215010040 its reverse (40010512), we get a palindrome (255020552).

The spelling of 215010040 in words is "two hundred fifteen million, ten thousand, forty".