212304451 has 2 divisors, whose sum is σ = 212304452. Its totient is φ = 212304450.

The previous prime is 212304431. The next prime is 212304509. The reversal of 212304451 is 154403212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212304451 - 2⁵ = 212304419 is a prime.

It is a super-2 number, since 2×212304451² = 90146359828822802, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (212304401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106152225 + 106152226.

It is an arithmetic number, because the mean of its divisors is an integer number (106152226).

Almost surely, 2^212304451 is an apocalyptic number.

212304451 is a deficient number, since it is larger than the sum of its proper divisors (1).

212304451 is an equidigital number, since it uses as much as digits as its factorization.

212304451 is an evil number, because the sum of its binary digits is even.

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

The square root of 212304451 is about 14570.6709179777. The cubic root of 212304451 is about 596.5584931633.

Adding to 212304451 its reverse (154403212), we get a palindrome (366707663).

The spelling of 212304451 in words is "two hundred twelve million, three hundred four thousand, four hundred fifty-one".