219927437137 has 2 divisors, whose sum is σ = 219927437138. Its totient is φ = 219927437136.

The previous prime is 219927437117. The next prime is 219927437161. The reversal of 219927437137 is 731734729912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145978249041 + 73949188096 = 382071^2 + 271936^2 .

It is a cyclic number.

It is not a de Polignac number, because 219927437137 - 2¹¹ = 219927435089 is a prime.

It is not a weakly prime, because it can be changed into another prime (219927437117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109963718568 + 109963718569.

It is an arithmetic number, because the mean of its divisors is an integer number (109963718569).

Almost surely, 2^219927437137 is an apocalyptic number.

It is an amenable number.

219927437137 is a deficient number, since it is larger than the sum of its proper divisors (1).

219927437137 is an equidigital number, since it uses as much as digits as its factorization.

219927437137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 55.

The spelling of 219927437137 in words is "two hundred nineteen billion, nine hundred twenty-seven million, four hundred thirty-seven thousand, one hundred thirty-seven".