213306456406 has 4 divisors (see below), whose sum is σ = 319959684612. Its totient is φ = 106653228202.

The previous prime is 213306456383. The next prime is 213306456409. The reversal of 213306456406 is 604654603312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213306456409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53326614100 + ... + 53326614103.

It is an arithmetic number, because the mean of its divisors is an integer number (79989921153).

Almost surely, 2^213306456406 is an apocalyptic number.

213306456406 is a deficient number, since it is larger than the sum of its proper divisors (106653228206).

213306456406 is a wasteful number, since it uses less digits than its factorization.

213306456406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106653228205.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 213306456406 in words is "two hundred thirteen billion, three hundred six million, four hundred fifty-six thousand, four hundred six".