1215231002 has 4 divisors (see below), whose sum is σ = 1822846506. Its totient is φ = 607615500.

The previous prime is 1215231001. The next prime is 1215231019. The reversal of 1215231002 is 2001325121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2001325121 = 131 ⋅15277291.

It can be written as a sum of positive squares in only one way, i.e., 1172994001 + 42237001 = 34249^2 + 6499^2 .

It is not an unprimeable number, because it can be changed into a prime (1215231001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303807749 + ... + 303807752.

Almost surely, 2^1215231002 is an apocalyptic number.

1215231002 is a deficient number, since it is larger than the sum of its proper divisors (607615504).

1215231002 is an equidigital number, since it uses as much as digits as its factorization.

1215231002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607615503.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1215231002 is about 34860.1635394902. The cubic root of 1215231002 is about 1067.1356125323.

Adding to 1215231002 its reverse (2001325121), we get a palindrome (3216556123).

The spelling of 1215231002 in words is "one billion, two hundred fifteen million, two hundred thirty-one thousand, two".