212432251 has 2 divisors, whose sum is σ = 212432252. Its totient is φ = 212432250.

The previous prime is 212432237. The next prime is 212432299. The reversal of 212432251 is 152234212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212432251 - 2⁷ = 212432123 is a prime.

It is a super-2 number, since 2×212432251² = 90254922529854002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212436251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106216125 + 106216126.

It is an arithmetic number, because the mean of its divisors is an integer number (106216126).

Almost surely, 2^212432251 is an apocalyptic number.

212432251 is a deficient number, since it is larger than the sum of its proper divisors (1).

212432251 is an equidigital number, since it uses as much as digits as its factorization.

212432251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 212432251 is about 14575.0557803392. The cubic root of 212432251 is about 596.6781717384.

Adding to 212432251 its reverse (152234212), we get a palindrome (364666463).

The spelling of 212432251 in words is "two hundred twelve million, four hundred thirty-two thousand, two hundred fifty-one".