212303257 has 4 divisors (see below), whose sum is σ = 214990720. Its totient is φ = 209615796.

The previous prime is 212303243. The next prime is 212303269. The reversal of 212303257 is 752303212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212303257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212303237) 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 in 3 ways as a sum of consecutive naturals, for example, 1343613 + ... + 1343770.

It is an arithmetic number, because the mean of its divisors is an integer number (53747680).

Almost surely, 2^212303257 is an apocalyptic number.

It is an amenable number.

212303257 is a deficient number, since it is larger than the sum of its proper divisors (2687463).

212303257 is an equidigital number, since it uses as much as digits as its factorization.

212303257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687462.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 212303257 is about 14570.6299452014. The cubic root of 212303257 is about 596.5573748131.

Adding to 212303257 its reverse (752303212), we get a palindrome (964606469).

The spelling of 212303257 in words is "two hundred twelve million, three hundred three thousand, two hundred fifty-seven".