43451 has 2 divisors, whose sum is σ = 43452. Its totient is φ = 43450.

The previous prime is 43441. The next prime is 43457. The reversal of 43451 is 15434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43451 - 2¹⁴ = 27067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725 + 21726.

It is an arithmetic number, because the mean of its divisors is an integer number (21726).

2⁴³⁴⁵¹ is an apocalyptic number.

43451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43451 is an equidigital number, since it uses as much as digits as its factorization.

43451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 17.

The square root of 43451 is about 208.4490345384. The cubic root of 43451 is about 35.1560380070.

Subtracting from 43451 its sum of digits (17), we obtain a palindrome (43434).

Adding to 43451 its reverse (15434), we get a palindrome (58885).

It can be divided in two parts, 43 and 451, that added together give a palindrome (494).

The spelling of 43451 in words is "forty-three thousand, four hundred fifty-one".