212255091157 has 2 divisors, whose sum is σ = 212255091158. Its totient is φ = 212255091156.

The previous prime is 212255091151. The next prime is 212255091161. The reversal of 212255091157 is 751190552212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132327885361 + 79927205796 = 363769^2 + 282714^2 .

It is a cyclic number.

It is not a de Polignac number, because 212255091157 - 2⁷ = 212255091029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212255091151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106127545578 + 106127545579.

It is an arithmetic number, because the mean of its divisors is an integer number (106127545579).

Almost surely, 2^212255091157 is an apocalyptic number.

It is an amenable number.

212255091157 is a deficient number, since it is larger than the sum of its proper divisors (1).

212255091157 is an equidigital number, since it uses as much as digits as its factorization.

212255091157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 40.

The spelling of 212255091157 in words is "two hundred twelve billion, two hundred fifty-five million, ninety-one thousand, one hundred fifty-seven".