213542403 has 8 divisors (see below), whose sum is σ = 285946128. Its totient is φ = 141750144.

The previous prime is 213542401. The next prime is 213542443. The reversal of 213542403 is 304245312.

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

It is not a de Polignac number, because 213542403 - 2¹ = 213542401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213542401) 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, 152050 + ... + 153447.

It is an arithmetic number, because the mean of its divisors is an integer number (35743266).

Almost surely, 2^213542403 is an apocalyptic number.

213542403 is a deficient number, since it is larger than the sum of its proper divisors (72403725).

213542403 is a wasteful number, since it uses less digits than its factorization.

213542403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305733.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213542403 is about 14613.0901249530. The cubic root of 213542403 is about 597.7157620193.

Adding to 213542403 its reverse (304245312), we get a palindrome (517787715).

The spelling of 213542403 in words is "two hundred thirteen million, five hundred forty-two thousand, four hundred three".