213011423 has 4 divisors (see below), whose sum is σ = 213160080. Its totient is φ = 212862768.

The previous prime is 213011389. The next prime is 213011453. The reversal of 213011423 is 324110312.

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

It is a cyclic number.

It is not a de Polignac number, because 213011423 - 2¹⁸ = 212749279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213011453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72158 + ... + 75051.

It is an arithmetic number, because the mean of its divisors is an integer number (53290020).

Almost surely, 2^213011423 is an apocalyptic number.

213011423 is a deficient number, since it is larger than the sum of its proper divisors (148657).

213011423 is a wasteful number, since it uses less digits than its factorization.

213011423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148656.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213011423 is about 14594.9108596113. The cubic root of 213011423 is about 597.2199377251.

Adding to 213011423 its reverse (324110312), we get a palindrome (537121735).

The spelling of 213011423 in words is "two hundred thirteen million, eleven thousand, four hundred twenty-three".