43951 has 2 divisors, whose sum is σ = 43952. Its totient is φ = 43950.

The previous prime is 43943. The next prime is 43961. The reversal of 43951 is 15934.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43951 - 2³ = 43943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21975 + 21976.

It is an arithmetic number, because the mean of its divisors is an integer number (21976).

2⁴³⁹⁵¹ is an apocalyptic number.

43951 is a deficient number, since it is larger than the sum of its proper divisors (1).

43951 is an equidigital number, since it uses as much as digits as its factorization.

43951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 22.

The square root of 43951 is about 209.6449379308. The cubic root of 43951 is about 35.2903734045.

The spelling of 43951 in words is "forty-three thousand, nine hundred fifty-one".