215131452 has 72 divisors (see below), whose sum is σ = 540355536. Its totient is φ = 66583296.

The previous prime is 215131429. The next prime is 215131459. The reversal of 215131452 is 254131512.

It is a happy number.

215131452 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×215131452³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215131459) 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, 229128 + ... + 230064.

It is an arithmetic number, because the mean of its divisors is an integer number (7504938).

Almost surely, 2^215131452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215131452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270177768).

215131452 is an abundant number, since it is smaller than the sum of its proper divisors (325224084).

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

215131452 is a wasteful number, since it uses less digits than its factorization.

215131452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1014 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 215131452 is about 14667.3600896685. The cubic root of 215131452 is about 599.1947085486.

Adding to 215131452 its reverse (254131512), we get a palindrome (469262964).

The spelling of 215131452 in words is "two hundred fifteen million, one hundred thirty-one thousand, four hundred fifty-two".