212871497 has 4 divisors (see below), whose sum is σ = 224075280. Its totient is φ = 201667716.

The previous prime is 212871487. The next prime is 212871499. The reversal of 212871497 is 794178212.

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-212871497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212871499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5601863 + ... + 5601900.

It is an arithmetic number, because the mean of its divisors is an integer number (56018820).

Almost surely, 2^212871497 is an apocalyptic number.

It is an amenable number.

212871497 is a deficient number, since it is larger than the sum of its proper divisors (11203783).

212871497 is a wasteful number, since it uses less digits than its factorization.

212871497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11203782.

The product of its digits is 56448, while the sum is 41.

The square root of 212871497 is about 14590.1164148885. The cubic root of 212871497 is about 597.0891389466.

The spelling of 212871497 in words is "two hundred twelve million, eight hundred seventy-one thousand, four hundred ninety-seven".