213142427 has 4 divisors (see below), whose sum is σ = 213328440. Its totient is φ = 212956416.

The previous prime is 213142411. The next prime is 213142429. The reversal of 213142427 is 724241312.

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 213142427 - 2⁴ = 213142411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213142396 and 213142405.

It is not an unprimeable number, because it can be changed into a prime (213142429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91277 + ... + 93582.

It is an arithmetic number, because the mean of its divisors is an integer number (53332110).

Almost surely, 2^213142427 is an apocalyptic number.

213142427 is a deficient number, since it is larger than the sum of its proper divisors (186013).

213142427 is a wasteful number, since it uses less digits than its factorization.

213142427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186012.

The product of its digits is 2688, while the sum is 26.

The square root of 213142427 is about 14599.3981725275. The cubic root of 213142427 is about 597.3423445676.

Adding to 213142427 its reverse (724241312), we get a palindrome (937383739).

The spelling of 213142427 in words is "two hundred thirteen million, one hundred forty-two thousand, four hundred twenty-seven".