212227431 has 16 divisors (see below), whose sum is σ = 308413056. Its totient is φ = 129026016.

The previous prime is 212227429. The next prime is 212227451. The reversal of 212227431 is 134722212.

It is not a de Polignac number, because 212227431 - 2¹ = 212227429 is a prime.

It is a super-2 number, since 2×212227431² = 90080964937719522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212227451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29545 + ... + 36018.

It is an arithmetic number, because the mean of its divisors is an integer number (19275816).

Almost surely, 2^212227431 is an apocalyptic number.

212227431 is a deficient number, since it is larger than the sum of its proper divisors (96185625).

212227431 is a wasteful number, since it uses less digits than its factorization.

212227431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65662.

The product of its digits is 1344, while the sum is 24.

The square root of 212227431 is about 14568.0276976672. The cubic root of 212227431 is about 596.4863444287.

Adding to 212227431 its reverse (134722212), we get a palindrome (346949643).

The spelling of 212227431 in words is "two hundred twelve million, two hundred twenty-seven thousand, four hundred thirty-one".