215134451 has 12 divisors (see below), whose sum is σ = 258333120. Its totient is φ = 178451280.

The previous prime is 215134429. The next prime is 215134453. The reversal of 215134451 is 154431512.

It is not a de Polignac number, because 215134451 - 2¹⁴ = 215118067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215134451.

It is not an unprimeable number, because it can be changed into a prime (215134453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69296 + ... + 72333.

It is an arithmetic number, because the mean of its divisors is an integer number (21527760).

Almost surely, 2^215134451 is an apocalyptic number.

215134451 is a deficient number, since it is larger than the sum of its proper divisors (43198669).

215134451 is a wasteful number, since it uses less digits than its factorization.

215134451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141674 (or 141667 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 215134451 is about 14667.4623231151. The cubic root of 215134451 is about 599.1974928564.

Adding to 215134451 its reverse (154431512), we get a palindrome (369565963).

The spelling of 215134451 in words is "two hundred fifteen million, one hundred thirty-four thousand, four hundred fifty-one".