212231137 has 2 divisors, whose sum is σ = 212231138. Its totient is φ = 212231136.

The previous prime is 212231119. The next prime is 212231147. The reversal of 212231137 is 731132212.

It is a happy number.

212231137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112550881 + 99680256 = 10609^2 + 9984^2 .

It is a cyclic number.

It is not a de Polignac number, because 212231137 - 2¹¹ = 212229089 is a prime.

It is not a weakly prime, because it can be changed into another prime (212231147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106115568 + 106115569.

It is an arithmetic number, because the mean of its divisors is an integer number (106115569).

Almost surely, 2^212231137 is an apocalyptic number.

It is an amenable number.

212231137 is a deficient number, since it is larger than the sum of its proper divisors (1).

212231137 is an equidigital number, since it uses as much as digits as its factorization.

212231137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 212231137 is about 14568.1548934654. The cubic root of 212231137 is about 596.4898164359.

Adding to 212231137 its reverse (731132212), we get a palindrome (943363349).

The spelling of 212231137 in words is "two hundred twelve million, two hundred thirty-one thousand, one hundred thirty-seven".