213581423 has 16 divisors (see below), whose sum is σ = 240468480. Its totient is φ = 188011200.

The previous prime is 213581411. The next prime is 213581443. The reversal of 213581423 is 324185312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 213581423 - 2⁶ = 213581359 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 (213581443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60986 + ... + 64392.

It is an arithmetic number, because the mean of its divisors is an integer number (15029280).

Almost surely, 2^213581423 is an apocalyptic number.

213581423 is a deficient number, since it is larger than the sum of its proper divisors (26887057).

213581423 is a wasteful number, since it uses less digits than its factorization.

213581423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598.

The product of its digits is 5760, while the sum is 29.

The square root of 213581423 is about 14614.4251683055. The cubic root of 213581423 is about 597.7521661063.

The spelling of 213581423 in words is "two hundred thirteen million, five hundred eighty-one thousand, four hundred twenty-three".