213422131 has 8 divisors (see below), whose sum is σ = 243359424. Its totient is φ = 185416320.

The previous prime is 213422123. The next prime is 213422141. The reversal of 213422131 is 131224312.

It is a happy number.

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 213422131 - 2³ = 213422123 is a prime.

It is a super-2 number, since 2×213422131² = 91098012001162322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213422099 and 213422108.

It is not an unprimeable number, because it can be changed into a prime (213422141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482635 + ... + 483076.

It is an arithmetic number, because the mean of its divisors is an integer number (30419928).

Almost surely, 2^213422131 is an apocalyptic number.

213422131 is a deficient number, since it is larger than the sum of its proper divisors (29937293).

213422131 is a wasteful number, since it uses less digits than its factorization.

213422131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965741.

The product of its digits is 288, while the sum is 19.

The square root of 213422131 is about 14608.9743308694. The cubic root of 213422131 is about 597.6035251837.

Adding to 213422131 its reverse (131224312), we get a palindrome (344646443).

The spelling of 213422131 in words is "two hundred thirteen million, four hundred twenty-two thousand, one hundred thirty-one".