43421351 has 2 divisors, whose sum is σ = 43421352. Its totient is φ = 43421350.

The previous prime is 43421341. The next prime is 43421369. The reversal of 43421351 is 15312434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43421351 - 2²² = 39227047 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43421321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710675 + 21710676.

It is an arithmetic number, because the mean of its divisors is an integer number (21710676).

Almost surely, 2^43421351 is an apocalyptic number.

43421351 is a deficient number, since it is larger than the sum of its proper divisors (1).

43421351 is an equidigital number, since it uses as much as digits as its factorization.

43421351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 43421351 is about 6589.4879163710. The cubic root of 43421351 is about 351.4803988997.

Adding to 43421351 its reverse (15312434), we get a palindrome (58733785).

The spelling of 43421351 in words is "forty-three million, four hundred twenty-one thousand, three hundred fifty-one".