215245551289 has 4 divisors (see below), whose sum is σ = 227907054324. Its totient is φ = 202584048256.

The previous prime is 215245551253. The next prime is 215245551299. The reversal of 215245551289 is 982155542512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 159294379689 + 55951171600 = 399117^2 + 236540^2 .

It is a cyclic number.

It is not a de Polignac number, because 215245551289 - 2¹⁹ = 215245027001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215245551299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6330751492 + ... + 6330751525.

It is an arithmetic number, because the mean of its divisors is an integer number (56976763581).

Almost surely, 2^215245551289 is an apocalyptic number.

It is an amenable number.

215245551289 is a deficient number, since it is larger than the sum of its proper divisors (12661503035).

215245551289 is a wasteful number, since it uses less digits than its factorization.

215245551289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12661503034.

The product of its digits is 1440000, while the sum is 49.

The spelling of 215245551289 in words is "two hundred fifteen billion, two hundred forty-five million, five hundred fifty-one thousand, two hundred eighty-nine".