1251132313 has 2 divisors, whose sum is σ = 1251132314. Its totient is φ = 1251132312.

The previous prime is 1251132301. The next prime is 1251132329. The reversal of 1251132313 is 3132311521.

1251132313 is nontrivially palindromic in base 7.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137240729 + 113891584 = 33723^2 + 10672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251132313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251132353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625566156 + 625566157.

It is an arithmetic number, because the mean of its divisors is an integer number (625566157).

Almost surely, 2^1251132313 is an apocalyptic number.

It is an amenable number.

1251132313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251132313 is an equidigital number, since it uses as much as digits as its factorization.

1251132313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 22.

The square root of 1251132313 is about 35371.3487585645. The cubic root of 1251132313 is about 1077.5425127722.

Adding to 1251132313 its reverse (3132311521), we get a palindrome (4383443834).

The spelling of 1251132313 in words is "one billion, two hundred fifty-one million, one hundred thirty-two thousand, three hundred thirteen".