215112290 has 8 divisors (see below), whose sum is σ = 387202140. Its totient is φ = 86044912.

The previous prime is 215112269. The next prime is 215112299. The reversal of 215112290 is 92211512.

It can be written as a sum of positive squares in 2 ways, for example, as 213773641 + 1338649 = 14621^2 + 1157^2 .

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

It is not an unprimeable number, because it can be changed into a prime (215112299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10755605 + ... + 10755624.

Almost surely, 2^215112290 is an apocalyptic number.

215112290 is a deficient number, since it is larger than the sum of its proper divisors (172089850).

215112290 is a wasteful number, since it uses less digits than its factorization.

215112290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21511236.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 215112290 is about 14666.7068560055. The cubic root of 215112290 is about 599.1769177052.

It can be divided in two parts, 2151 and 12290, that added together give a palindrome (14441).

The spelling of 215112290 in words is "two hundred fifteen million, one hundred twelve thousand, two hundred ninety".