212118479 has 4 divisors (see below), whose sum is σ = 212473200. Its totient is φ = 211763760.

The previous prime is 212118457. The next prime is 212118493. The reversal of 212118479 is 974811212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212118479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212118409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176462 + ... + 177659.

It is an arithmetic number, because the mean of its divisors is an integer number (53118300).

Almost surely, 2^212118479 is an apocalyptic number.

212118479 is a deficient number, since it is larger than the sum of its proper divisors (354721).

212118479 is an equidigital number, since it uses as much as digits as its factorization.

212118479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354720.

The product of its digits is 8064, while the sum is 35.

The square root of 212118479 is about 14564.2877958381. The cubic root of 212118479 is about 596.3842534718.

The spelling of 212118479 in words is "two hundred twelve million, one hundred eighteen thousand, four hundred seventy-nine".