215135040 has 112 divisors (see below), whose sum is σ = 705185280. Its totient is φ = 55511040.

The previous prime is 215134999. The next prime is 215135047. The reversal of 215135040 is 40531512.

It is a junction number, because it is equal to n+sod(n) for n = 215134998 and 215135016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215135047) 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, 26146 + ... + 33374.

Almost surely, 2^215135040 is an apocalyptic number.

215135040 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 215135040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352592640).

215135040 is an abundant number, since it is smaller than the sum of its proper divisors (490050240).

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

215135040 is a wasteful number, since it uses less digits than its factorization.

215135040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280 (or 7270 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 215135040 is about 14667.4824015575. The cubic root of 215135040 is about 599.1980396881.

Adding to 215135040 its reverse (40531512), we get a palindrome (255666552).

The spelling of 215135040 in words is "two hundred fifteen million, one hundred thirty-five thousand, forty".