12551333237 has 2 divisors, whose sum is σ = 12551333238. Its totient is φ = 12551333236.

The previous prime is 12551333233. The next prime is 12551333269. The reversal of 12551333237 is 73233315521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8236288516 + 4315044721 = 90754^2 + 65689^2 .

It is a cyclic number.

It is not a de Polignac number, because 12551333237 - 2² = 12551333233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12551333197 and 12551333206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12551333231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275666618 + 6275666619.

It is an arithmetic number, because the mean of its divisors is an integer number (6275666619).

Almost surely, 2^12551333237 is an apocalyptic number.

It is an amenable number.

12551333237 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551333237 is an equidigital number, since it uses as much as digits as its factorization.

12551333237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 35.

Adding to 12551333237 its reverse (73233315521), we get a palindrome (85784648758).

The spelling of 12551333237 in words is "twelve billion, five hundred fifty-one million, three hundred thirty-three thousand, two hundred thirty-seven".