202212991 has 4 divisors (see below), whose sum is σ = 212855800. Its totient is φ = 191570184.

The previous prime is 202212979. The next prime is 202213007. The reversal of 202212991 is 199212202.

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

It is a cyclic number.

It is not a de Polignac number, because 202212991 - 2⁷ = 202212863 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 (202212971) 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, 5321376 + ... + 5321413.

It is an arithmetic number, because the mean of its divisors is an integer number (53213950).

Almost surely, 2^202212991 is an apocalyptic number.

202212991 is a deficient number, since it is larger than the sum of its proper divisors (10642809).

202212991 is a wasteful number, since it uses less digits than its factorization.

202212991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10642808.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 202212991 is about 14220.1614266505. The cubic root of 202212991 is about 586.9525823474.

It can be divided in two parts, 202212 and 991, that added together give a triangular number (203203 = T₆₃₇).

The spelling of 202212991 in words is "two hundred two million, two hundred twelve thousand, nine hundred ninety-one".