212100431 has 4 divisors (see below), whose sum is σ = 212691600. Its totient is φ = 211509264.

The previous prime is 212100409. The next prime is 212100433. The reversal of 212100431 is 134001212.

212100431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212100431 - 2¹⁸ = 211838287 is a prime.

It is a super-2 number, since 2×212100431² = 89973185660771522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100433) 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, 295046 + ... + 295763.

It is an arithmetic number, because the mean of its divisors is an integer number (53172900).

Almost surely, 2^212100431 is an apocalyptic number.

212100431 is a deficient number, since it is larger than the sum of its proper divisors (591169).

212100431 is an equidigital number, since it uses as much as digits as its factorization.

212100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591168.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212100431 is about 14563.6681849045. The cubic root of 212100431 is about 596.3673386352.

Adding to 212100431 its reverse (134001212), we get a palindrome (346101643).

The spelling of 212100431 in words is "two hundred twelve million, one hundred thousand, four hundred thirty-one".