212912497 has 6 divisors (see below), whose sum is σ = 247673778. Its totient is φ = 182496384.

The previous prime is 212912473. The next prime is 212912527. The reversal of 212912497 is 794219212.

It can be written as a sum of positive squares in only one way, i.e., 179318881 + 33593616 = 13391^2 + 5796^2 .

It is a de Polignac number, because none of the positive numbers 2^k-212912497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212912407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2172528 + ... + 2172625.

It is an arithmetic number, because the mean of its divisors is an integer number (41278963).

Almost surely, 2^212912497 is an apocalyptic number.

It is an amenable number.

212912497 is a deficient number, since it is larger than the sum of its proper divisors (34761281).

212912497 is an equidigital number, since it uses as much as digits as its factorization.

212912497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4345167 (or 4345160 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 212912497 is about 14591.5214079958. The cubic root of 212912497 is about 597.1274704964.

The spelling of 212912497 in words is "two hundred twelve million, nine hundred twelve thousand, four hundred ninety-seven".