1251304243323 has 16 divisors (see below), whose sum is σ = 1697591001600. Its totient is φ = 819625278560.

The previous prime is 1251304243309. The next prime is 1251304243391. The reversal of 1251304243323 is 3233424031521.

It is a cyclic number.

It is not a de Polignac number, because 1251304243323 - 2²² = 1251300049019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251304243523) 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, 1558068 + ... + 2220401.

It is an arithmetic number, because the mean of its divisors is an integer number (106099437600).

Almost surely, 2^{1251304243323} is an apocalyptic number.

1251304243323 is a deficient number, since it is larger than the sum of its proper divisors (446286758277).

1251304243323 is a wasteful number, since it uses less digits than its factorization.

1251304243323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3780402.

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 1251304243323 its reverse (3233424031521), we get a palindrome (4484728274844).

The spelling of 1251304243323 in words is "one trillion, two hundred fifty-one billion, three hundred four million, two hundred forty-three thousand, three hundred twenty-three".