215313450 has 72 divisors (see below), whose sum is σ = 586983264. Its totient is φ = 52192800.

The previous prime is 215313443. The next prime is 215313451. The reversal of 215313450 is 54313512.

215313450 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 215313450.

It is not an unprimeable number, because it can be changed into a prime (215313451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12219 + ... + 24081.

Almost surely, 2^215313450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215313450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293491632).

215313450 is an abundant number, since it is smaller than the sum of its proper divisors (371669814).

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

215313450 is a wasteful number, since it uses less digits than its factorization.

215313450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11884 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 215313450 is about 14673.5629620076. The cubic root of 215313450 is about 599.3636308514.

Adding to 215313450 its reverse (54313512), we get a palindrome (269626962).

The spelling of 215313450 in words is "two hundred fifteen million, three hundred thirteen thousand, four hundred fifty".