1231540303 has 16 divisors (see below), whose sum is σ = 1459584000. Its totient is φ = 1016703072.

The previous prime is 1231540249. The next prime is 1231540327. The reversal of 1231540303 is 3030451321.

It is a de Polignac number, because none of the positive numbers 2^k-1231540303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231540103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77818 + ... + 92296.

It is an arithmetic number, because the mean of its divisors is an integer number (91224000).

Almost surely, 2^1231540303 is an apocalyptic number.

1231540303 is a deficient number, since it is larger than the sum of its proper divisors (228043697).

1231540303 is a wasteful number, since it uses less digits than its factorization.

1231540303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14934.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1231540303 is about 35093.3085217111. The cubic root of 1231540303 is about 1071.8883308788. Note that the first 3 decimals are identical.

Adding to 1231540303 its reverse (3030451321), we get a palindrome (4261991624).

The spelling of 1231540303 in words is "one billion, two hundred thirty-one million, five hundred forty thousand, three hundred three".