213456403 has 8 divisors (see below), whose sum is σ = 226229760. Its totient is φ = 200707200.

The previous prime is 213456401. The next prime is 213456413. The reversal of 213456403 is 304654312.

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

It is a cyclic number.

It is not a de Polignac number, because 213456403 - 2¹ = 213456401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213456401) 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 7 ways as a sum of consecutive naturals, for example, 14113 + ... + 25021.

It is an arithmetic number, because the mean of its divisors is an integer number (28278720).

Almost surely, 2^213456403 is an apocalyptic number.

213456403 is a deficient number, since it is larger than the sum of its proper divisors (12773357).

213456403 is a wasteful number, since it uses less digits than its factorization.

213456403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12077.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 213456403 is about 14610.1472614071. The cubic root of 213456403 is about 597.6355118256.

The spelling of 213456403 in words is "two hundred thirteen million, four hundred fifty-six thousand, four hundred three".