1215252231 has 8 divisors (see below), whose sum is σ = 1644520704. Its totient is φ = 798075960.

The previous prime is 1215252209. The next prime is 1215252239. The reversal of 1215252231 is 1322525121.

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

It is not a de Polignac number, because 1215252231 - 2¹³ = 1215244039 is a prime.

It is a super-2 number, since 2×1215252231² = 2953675969900954722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215252239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3022815 + ... + 3023216.

It is an arithmetic number, because the mean of its divisors is an integer number (205565088).

Almost surely, 2^1215252231 is an apocalyptic number.

1215252231 is a deficient number, since it is larger than the sum of its proper divisors (429268473).

1215252231 is an equidigital number, since it uses as much as digits as its factorization.

1215252231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6046101.

The product of its digits is 1200, while the sum is 24.

The square root of 1215252231 is about 34860.4680261181. The cubic root of 1215252231 is about 1067.1418264647.

Adding to 1215252231 its reverse (1322525121), we get a palindrome (2537777352).

The spelling of 1215252231 in words is "one billion, two hundred fifteen million, two hundred fifty-two thousand, two hundred thirty-one".