43875431 has 2 divisors, whose sum is σ = 43875432. Its totient is φ = 43875430.

The previous prime is 43875413. The next prime is 43875439. The reversal of 43875431 is 13457834.

Together with previous prime (43875413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43875431 - 2¹⁴ = 43859047 is a prime.

It is a super-2 number, since 2×43875431² = 3850106890871522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43875391 and 43875400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43875439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21937715 + 21937716.

It is an arithmetic number, because the mean of its divisors is an integer number (21937716).

Almost surely, 2^43875431 is an apocalyptic number.

43875431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43875431 is an equidigital number, since it uses as much as digits as its factorization.

43875431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 43875431 is about 6623.8531837594. The cubic root of 43875431 is about 352.7013580549.

The spelling of 43875431 in words is "forty-three million, eight hundred seventy-five thousand, four hundred thirty-one".