1215214171 has 2 divisors, whose sum is σ = 1215214172. Its totient is φ = 1215214170.

The previous prime is 1215214097. The next prime is 1215214181. The reversal of 1215214171 is 1714125121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1215214171 is a prime.

It is not a weakly prime, because it can be changed into another prime (1215214181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607607085 + 607607086.

It is an arithmetic number, because the mean of its divisors is an integer number (607607086).

Almost surely, 2^1215214171 is an apocalyptic number.

1215214171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215214171 is an equidigital number, since it uses as much as digits as its factorization.

1215214171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 560, while the sum is 25.

The square root of 1215214171 is about 34859.9221312957. The cubic root of 1215214171 is about 1067.1306858853.

Adding to 1215214171 its reverse (1714125121), we get a palindrome (2929339292).

The spelling of 1215214171 in words is "one billion, two hundred fifteen million, two hundred fourteen thousand, one hundred seventy-one".