212725757 has 2 divisors, whose sum is σ = 212725758. Its totient is φ = 212725756.

The previous prime is 212725717. The next prime is 212725787. The reversal of 212725757 is 757527212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143736121 + 68989636 = 11989^2 + 8306^2 .

It is a cyclic number.

It is not a de Polignac number, because 212725757 - 2¹² = 212721661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212725757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212725717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106362878 + 106362879.

It is an arithmetic number, because the mean of its divisors is an integer number (106362879).

Almost surely, 2^212725757 is an apocalyptic number.

It is an amenable number.

212725757 is a deficient number, since it is larger than the sum of its proper divisors (1).

212725757 is an equidigital number, since it uses as much as digits as its factorization.

212725757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68600, while the sum is 38.

The square root of 212725757 is about 14585.1210828022. The cubic root of 212725757 is about 596.9528444545.

The spelling of 212725757 in words is "two hundred twelve million, seven hundred twenty-five thousand, seven hundred fifty-seven".