213141431 has 4 divisors (see below), whose sum is σ = 213178992. Its totient is φ = 213103872.

The previous prime is 213141421. The next prime is 213141443. The reversal of 213141431 is 134141312.

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 213141431 - 2⁶ = 213141367 is a prime.

It is a super-2 number, since 2×213141431² = 90858539217455522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213141421) 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, 8330 + ... + 22263.

It is an arithmetic number, because the mean of its divisors is an integer number (53294748).

Almost surely, 2^213141431 is an apocalyptic number.

213141431 is a deficient number, since it is larger than the sum of its proper divisors (37561).

213141431 is an equidigital number, since it uses as much as digits as its factorization.

213141431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37560.

The product of its digits is 288, while the sum is 20.

The square root of 213141431 is about 14599.3640614925. The cubic root of 213141431 is about 597.3414141195.

Adding to 213141431 its reverse (134141312), we get a palindrome (347282743).

The spelling of 213141431 in words is "two hundred thirteen million, one hundred forty-one thousand, four hundred thirty-one".