2151252137 has 2 divisors, whose sum is σ = 2151252138. Its totient is φ = 2151252136.

The previous prime is 2151252127. The next prime is 2151252163. The reversal of 2151252137 is 7312521512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1932833296 + 218418841 = 43964^2 + 14779^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151252137 - 2⁸ = 2151251881 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151252127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075626068 + 1075626069.

It is an arithmetic number, because the mean of its divisors is an integer number (1075626069).

Almost surely, 2^2151252137 is an apocalyptic number.

It is an amenable number.

2151252137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151252137 is an equidigital number, since it uses as much as digits as its factorization.

2151252137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 29.

The square root of 2151252137 is about 46381.5926526893. The cubic root of 2151252137 is about 1290.9133881342.

Adding to 2151252137 its reverse (7312521512), we get a palindrome (9463773649).

The spelling of 2151252137 in words is "two billion, one hundred fifty-one million, two hundred fifty-two thousand, one hundred thirty-seven".