215142266 has 8 divisors (see below), whose sum is σ = 322908660. Its totient is φ = 107506048.

The previous prime is 215142251. The next prime is 215142313. The reversal of 215142266 is 662241512.

It can be written as a sum of positive squares in 2 ways, for example, as 173475241 + 41667025 = 13171^2 + 6455^2 .

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

It is a super-2 number, since 2×215142266² = 92572389239229512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28301 + ... + 35088.

Almost surely, 2^215142266 is an apocalyptic number.

215142266 is a deficient number, since it is larger than the sum of its proper divisors (107766394).

215142266 is a wasteful number, since it uses less digits than its factorization.

215142266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65088.

The product of its digits is 5760, while the sum is 29.

The square root of 215142266 is about 14667.7287266979. The cubic root of 215142266 is about 599.2047482754.

Adding to 215142266 its reverse (662241512), we get a palindrome (877383778).

The spelling of 215142266 in words is "two hundred fifteen million, one hundred forty-two thousand, two hundred sixty-six".