212011431 has 32 divisors (see below), whose sum is σ = 299904000. Its totient is φ = 133031808.

The previous prime is 212011427. The next prime is 212011433. The reversal of 212011431 is 134110212.

It is not a de Polignac number, because 212011431 - 2² = 212011427 is a prime.

It is a super-2 number, since 2×212011431² = 89897693749335522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212011431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749016 + ... + 749298.

It is an arithmetic number, because the mean of its divisors is an integer number (9372000).

Almost surely, 2^212011431 is an apocalyptic number.

212011431 is a deficient number, since it is larger than the sum of its proper divisors (87892569).

212011431 is a wasteful number, since it uses less digits than its factorization.

212011431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 212011431 is about 14560.6123154214. The cubic root of 212011431 is about 596.2839125612.

Adding to 212011431 its reverse (134110212), we get a palindrome (346121643).

The spelling of 212011431 in words is "two hundred twelve million, eleven thousand, four hundred thirty-one".