212085451 has 2 divisors, whose sum is σ = 212085452. Its totient is φ = 212085450.

The previous prime is 212085431. The next prime is 212085473. The reversal of 212085451 is 154580212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212085451 - 2²¹ = 209988299 is a prime.

It is not a weakly prime, because it can be changed into another prime (212085431) 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 as a sum of consecutive naturals, namely, 106042725 + 106042726.

It is an arithmetic number, because the mean of its divisors is an integer number (106042726).

Almost surely, 2^212085451 is an apocalyptic number.

212085451 is a deficient number, since it is larger than the sum of its proper divisors (1).

212085451 is an equidigital number, since it uses as much as digits as its factorization.

212085451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 212085451 is about 14563.1538823155. The cubic root of 212085451 is about 596.3532984420.

It can be divided in two parts, 2120 and 85451, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 212085451 in words is "two hundred twelve million, eighty-five thousand, four hundred fifty-one".