212312537 has 2 divisors, whose sum is σ = 212312538. Its totient is φ = 212312536.

The previous prime is 212312461. The next prime is 212312591. The reversal of 212312537 is 735213212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108659776 + 103652761 = 10424^2 + 10181^2 .

It is a cyclic number.

It is not a de Polignac number, because 212312537 - 2⁸ = 212312281 is a prime.

It is a super-2 number, since 2×212312537² = 90153226734752738, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212312237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106156268 + 106156269.

It is an arithmetic number, because the mean of its divisors is an integer number (106156269).

Almost surely, 2^212312537 is an apocalyptic number.

It is an amenable number.

212312537 is a deficient number, since it is larger than the sum of its proper divisors (1).

212312537 is an equidigital number, since it uses as much as digits as its factorization.

212312537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 26.

The square root of 212312537 is about 14570.9483905475. The cubic root of 212312537 is about 596.5660667378.

Adding to 212312537 its reverse (735213212), we get a palindrome (947525749).

The spelling of 212312537 in words is "two hundred twelve million, three hundred twelve thousand, five hundred thirty-seven".