212310097 has 4 divisors (see below), whose sum is σ = 212641956. Its totient is φ = 211978240.

The previous prime is 212310083. The next prime is 212310101. The reversal of 212310097 is 790013212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115799121 + 96510976 = 10761^2 + 9824^2 .

It is a cyclic number.

It is not a de Polignac number, because 212310097 - 2¹⁹ = 211785809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212310017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164968 + ... + 166249.

It is an arithmetic number, because the mean of its divisors is an integer number (53160489).

Almost surely, 2^212310097 is an apocalyptic number.

It is an amenable number.

212310097 is a deficient number, since it is larger than the sum of its proper divisors (331859).

212310097 is an equidigital number, since it uses as much as digits as its factorization.

212310097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331858.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 212310097 is about 14570.8646620576. The cubic root of 212310097 is about 596.5637813856.

The spelling of 212310097 in words is "two hundred twelve million, three hundred ten thousand, ninety-seven".