212222431 has 8 divisors (see below), whose sum is σ = 214419744. Its totient is φ = 210036480.

The previous prime is 212222429. The next prime is 212222447. The reversal of 212222431 is 134222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212222431 - 2¹ = 212222429 is a prime.

It is a super-2 number, since 2×212222431² = 90076720439099522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222399 and 212222408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37611 + ... + 42883.

It is an arithmetic number, because the mean of its divisors is an integer number (26802468).

Almost surely, 2^212222431 is an apocalyptic number.

212222431 is a deficient number, since it is larger than the sum of its proper divisors (2197313).

212222431 is a wasteful number, since it uses less digits than its factorization.

212222431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5681.

The product of its digits is 384, while the sum is 19.

The square root of 212222431 is about 14567.8560879767. The cubic root of 212222431 is about 596.4816600591.

Adding to 212222431 its reverse (134222212), we get a palindrome (346444643).

It can be divided in two parts, 21222 and 2431, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 212222431 in words is "two hundred twelve million, two hundred twenty-two thousand, four hundred thirty-one".