1215030231 has 24 divisors (see below), whose sum is σ = 1802410896. Its totient is φ = 788296320.

The previous prime is 1215030227. The next prime is 1215030233. The reversal of 1215030231 is 1320305121.

It is not a de Polignac number, because 1215030231 - 2² = 1215030227 is a prime.

It is a super-2 number, since 2×1215030231² = 2952596924487826722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215030233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103161 + ... + 114333.

It is an arithmetic number, because the mean of its divisors is an integer number (75100454).

Almost surely, 2^1215030231 is an apocalyptic number.

1215030231 is a deficient number, since it is larger than the sum of its proper divisors (587380665).

1215030231 is a wasteful number, since it uses less digits than its factorization.

1215030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11503 (or 11500 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1215030231 is about 34857.2837582047. The cubic root of 1215030231 is about 1067.0768413511.

Adding to 1215030231 its reverse (1320305121), we get a palindrome (2535335352).

The spelling of 1215030231 in words is "one billion, two hundred fifteen million, thirty thousand, two hundred thirty-one".