1251500232403 has 2 divisors, whose sum is σ = 1251500232404. Its totient is φ = 1251500232402.

The previous prime is 1251500232391. The next prime is 1251500232419. The reversal of 1251500232403 is 3042320051521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251500232403 is a prime.

It is a super-2 number, since 2×1251500232403² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1251500232503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625750116201 + 625750116202.

It is an arithmetic number, because the mean of its divisors is an integer number (625750116202).

Almost surely, 2^{1251500232403} is an apocalyptic number.

1251500232403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251500232403 is an equidigital number, since it uses as much as digits as its factorization.

1251500232403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 1251500232403 its reverse (3042320051521), we get a palindrome (4293820283924).

The spelling of 1251500232403 in words is "one trillion, two hundred fifty-one billion, five hundred million, two hundred thirty-two thousand, four hundred three".