212278453 has 2 divisors, whose sum is σ = 212278454. Its totient is φ = 212278452.

The previous prime is 212278447. The next prime is 212278459. The reversal of 212278453 is 354872212.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (212278447) and next prime (212278459).

It can be written as a sum of positive squares in only one way, i.e., 169989444 + 42289009 = 13038^2 + 6503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212278453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212278459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106139226 + 106139227.

It is an arithmetic number, because the mean of its divisors is an integer number (106139227).

Almost surely, 2^212278453 is an apocalyptic number.

It is an amenable number.

212278453 is a deficient number, since it is larger than the sum of its proper divisors (1).

212278453 is an equidigital number, since it uses as much as digits as its factorization.

212278453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 212278453 is about 14569.7787560416. The cubic root of 212278453 is about 596.5341414037.

The spelling of 212278453 in words is "two hundred twelve million, two hundred seventy-eight thousand, four hundred fifty-three".