213111432 has 64 divisors (see below), whose sum is σ = 593208000. Its totient is φ = 70889472.

The previous prime is 213111421. The next prime is 213111433. The reversal of 213111432 is 234111312.

It is a super-3 number, since 3×213111432³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111433) 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 15 ways as a sum of consecutive naturals, for example, 165463 + ... + 166745.

It is an arithmetic number, because the mean of its divisors is an integer number (9268875).

Almost surely, 2^213111432 is an apocalyptic number.

It is an amenable number.

213111432 is an abundant number, since it is smaller than the sum of its proper divisors (380096568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213111432 is a wasteful number, since it uses less digits than its factorization.

213111432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067 (or 2057 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 213111432 is about 14598.3366175739. The cubic root of 213111432 is about 597.3133881498.

Adding to 213111432 its reverse (234111312), we get a palindrome (447222744).

The spelling of 213111432 in words is "two hundred thirteen million, one hundred eleven thousand, four hundred thirty-two".