213421432 has 32 divisors (see below), whose sum is σ = 464836320. Its totient is φ = 89965440.

The previous prime is 213421399. The next prime is 213421447. The reversal of 213421432 is 234124312.

213421432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27823 + ... + 34654.

It is an arithmetic number, because the mean of its divisors is an integer number (14526135).

Almost surely, 2^213421432 is an apocalyptic number.

It is an amenable number.

213421432 is an abundant number, since it is smaller than the sum of its proper divisors (251414888).

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

213421432 is a wasteful number, since it uses less digits than its factorization.

213421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62551 (or 62547 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 213421432 is about 14608.9504071990. The cubic root of 213421432 is about 597.6028727594.

Adding to 213421432 its reverse (234124312), we get a palindrome (447545744).

The spelling of 213421432 in words is "two hundred thirteen million, four hundred twenty-one thousand, four hundred thirty-two".