215133145 has 8 divisors (see below), whose sum is σ = 269384256. Its totient is φ = 164623536.

The previous prime is 215133137. The next prime is 215133151. The reversal of 215133145 is 541331512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215133145 - 2³ = 215133137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935247 + ... + 935476.

It is an arithmetic number, because the mean of its divisors is an integer number (33673032).

Almost surely, 2^215133145 is an apocalyptic number.

It is an amenable number.

215133145 is a deficient number, since it is larger than the sum of its proper divisors (54251111).

215133145 is a wasteful number, since it uses less digits than its factorization.

215133145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870751.

The product of its digits is 1800, while the sum is 25.

The square root of 215133145 is about 14667.4178027354. The cubic root of 215133145 is about 599.1962803534.

Adding to 215133145 its reverse (541331512), we get a palindrome (756464657).

The spelling of 215133145 in words is "two hundred fifteen million, one hundred thirty-three thousand, one hundred forty-five".