213576431 has 2 divisors, whose sum is σ = 213576432. Its totient is φ = 213576430.

The previous prime is 213576383. The next prime is 213576439. The reversal of 213576431 is 134675312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213576431 is a prime.

It is a super-4 number, since 4×213576431⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213576439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106788215 + 106788216.

It is an arithmetic number, because the mean of its divisors is an integer number (106788216).

Almost surely, 2^213576431 is an apocalyptic number.

213576431 is a deficient number, since it is larger than the sum of its proper divisors (1).

213576431 is an equidigital number, since it uses as much as digits as its factorization.

213576431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 213576431 is about 14614.2543771484. The cubic root of 213576431 is about 597.7475090189.

The spelling of 213576431 in words is "two hundred thirteen million, five hundred seventy-six thousand, four hundred thirty-one".