212045497 has 2 divisors, whose sum is σ = 212045498. Its totient is φ = 212045496.

The previous prime is 212045479. The next prime is 212045501. The reversal of 212045497 is 794540212.

Together with previous prime (212045479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179452816 + 32592681 = 13396^2 + 5709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212045497 is a prime.

It is not a weakly prime, because it can be changed into another prime (212045447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106022748 + 106022749.

It is an arithmetic number, because the mean of its divisors is an integer number (106022749).

Almost surely, 2^212045497 is an apocalyptic number.

It is an amenable number.

212045497 is a deficient number, since it is larger than the sum of its proper divisors (1).

212045497 is an equidigital number, since it uses as much as digits as its factorization.

212045497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 212045497 is about 14561.7820681399. The cubic root of 212045497 is about 596.3158478202.

The spelling of 212045497 in words is "two hundred twelve million, forty-five thousand, four hundred ninety-seven".