213432506 has 8 divisors (see below), whose sum is σ = 365884320. Its totient is φ = 91471068.

The previous prime is 213432487. The next prime is 213432523. The reversal of 213432506 is 605234312.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7622576 + ... + 7622603.

It is an arithmetic number, because the mean of its divisors is an integer number (45735540).

Almost surely, 2^213432506 is an apocalyptic number.

213432506 is a deficient number, since it is larger than the sum of its proper divisors (152451814).

213432506 is a wasteful number, since it uses less digits than its factorization.

213432506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15245188.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 213432506 is about 14609.3294165064. The cubic root of 213432506 is about 597.6132087095.

Adding to 213432506 its reverse (605234312), we get a palindrome (818666818).

The spelling of 213432506 in words is "two hundred thirteen million, four hundred thirty-two thousand, five hundred six".