212225493 has 4 divisors (see below), whose sum is σ = 282967328. Its totient is φ = 141483660.

The previous prime is 212225449. The next prime is 212225513. The reversal of 212225493 is 394522212.

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 not a de Polignac number, because 212225493 - 2¹⁰ = 212224469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212225493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212225593) 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, 35370913 + ... + 35370918.

It is an arithmetic number, because the mean of its divisors is an integer number (70741832).

Almost surely, 2^212225493 is an apocalyptic number.

It is an amenable number.

212225493 is a deficient number, since it is larger than the sum of its proper divisors (70741835).

212225493 is an equidigital number, since it uses as much as digits as its factorization.

212225493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70741834.

The product of its digits is 8640, while the sum is 30.

The square root of 212225493 is about 14567.9611819911. The cubic root of 212225493 is about 596.4845287758.

The spelling of 212225493 in words is "two hundred twelve million, two hundred twenty-five thousand, four hundred ninety-three".