212031251 has 2 divisors, whose sum is σ = 212031252. Its totient is φ = 212031250.

The previous prime is 212031173. The next prime is 212031263. The reversal of 212031251 is 152130212.

It is a happy number.

212031251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212031251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212037251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106015625 + 106015626.

It is an arithmetic number, because the mean of its divisors is an integer number (106015626).

Almost surely, 2^212031251 is an apocalyptic number.

212031251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212031251 is an equidigital number, since it uses as much as digits as its factorization.

212031251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 212031251 is about 14561.2929027611. The cubic root of 212031251 is about 596.3024932871.

Adding to 212031251 its reverse (152130212), we get a palindrome (364161463).

The spelling of 212031251 in words is "two hundred twelve million, thirty-one thousand, two hundred fifty-one".