1215230031 has 12 divisors (see below), whose sum is σ = 1766958960. Its totient is φ = 804787200.

The previous prime is 1215229999. The next prime is 1215230033. The reversal of 1215230031 is 1300325121.

It is not a de Polignac number, because 1215230031 - 2⁵ = 1215229999 is a prime.

It is a super-2 number, since 2×1215230031² = 2953568056488521922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215229986 and 1215230013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215230033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445746 + ... + 448463.

It is an arithmetic number, because the mean of its divisors is an integer number (147246580).

Almost surely, 2^1215230031 is an apocalyptic number.

1215230031 is a deficient number, since it is larger than the sum of its proper divisors (551728929).

1215230031 is a wasteful number, since it uses less digits than its factorization.

1215230031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894366 (or 894363 counting only the distinct ones).

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

The square root of 1215230031 is about 34860.1496124156. The cubic root of 1215230031 is about 1067.1353283095.

Adding to 1215230031 its reverse (1300325121), we get a palindrome (2515555152).

The spelling of 1215230031 in words is "one billion, two hundred fifteen million, two hundred thirty thousand, thirty-one".