212245287 has 16 divisors (see below), whose sum is σ = 293466240. Its totient is φ = 136284512.

The previous prime is 212245273. The next prime is 212245309. The reversal of 212245287 is 782542212.

It is a cyclic number.

It is not a de Polignac number, because 212245287 - 2⁸ = 212245031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212245217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35788 + ... + 41294.

It is an arithmetic number, because the mean of its divisors is an integer number (18341640).

Almost surely, 2^212245287 is an apocalyptic number.

212245287 is a deficient number, since it is larger than the sum of its proper divisors (81220953).

212245287 is a wasteful number, since it uses less digits than its factorization.

212245287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5982.

The product of its digits is 17920, while the sum is 33.

The square root of 212245287 is about 14568.6405336943. The cubic root of 212245287 is about 596.5030726487.

Adding to 212245287 its reverse (782542212), we get a palindrome (994787499).

The spelling of 212245287 in words is "two hundred twelve million, two hundred forty-five thousand, two hundred eighty-seven".