212031193 has 4 divisors (see below), whose sum is σ = 231306768. Its totient is φ = 192755620.

The previous prime is 212031173. The next prime is 212031251. The reversal of 212031193 is 391130212.

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 not a de Polignac number, because 212031193 - 2⁵ = 212031161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212031163) 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, 9637771 + ... + 9637792.

It is an arithmetic number, because the mean of its divisors is an integer number (57826692).

Almost surely, 2^212031193 is an apocalyptic number.

It is an amenable number.

212031193 is a deficient number, since it is larger than the sum of its proper divisors (19275575).

212031193 is a wasteful number, since it uses less digits than its factorization.

212031193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275574.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 212031193 is about 14561.2909111795. The cubic root of 212031193 is about 596.3024389153.

The spelling of 212031193 in words is "two hundred twelve million, thirty-one thousand, one hundred ninety-three".