212303137 has 2 divisors, whose sum is σ = 212303138. Its totient is φ = 212303136.

The previous prime is 212303071. The next prime is 212303141. The reversal of 212303137 is 731303212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211731601 + 571536 = 14551^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 212303137 - 2¹⁹ = 211778849 is a prime.

It is not a weakly prime, because it can be changed into another prime (212303167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106151568 + 106151569.

It is an arithmetic number, because the mean of its divisors is an integer number (106151569).

Almost surely, 2^212303137 is an apocalyptic number.

It is an amenable number.

212303137 is a deficient number, since it is larger than the sum of its proper divisors (1).

212303137 is an equidigital number, since it uses as much as digits as its factorization.

212303137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 212303137 is about 14570.6258273281. The cubic root of 212303137 is about 596.5572624158.

Adding to 212303137 its reverse (731303212), we get a palindrome (943606349).

The spelling of 212303137 in words is "two hundred twelve million, three hundred three thousand, one hundred thirty-seven".