43972231 has 2 divisors, whose sum is σ = 43972232. Its totient is φ = 43972230.

The previous prime is 43972219. The next prime is 43972241. The reversal of 43972231 is 13227934.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43972231 - 2⁵ = 43972199 is a prime.

It is a super-2 number, since 2×43972231² = 3867114198234722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43972193 and 43972202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43972241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21986115 + 21986116.

It is an arithmetic number, because the mean of its divisors is an integer number (21986116).

Almost surely, 2^43972231 is an apocalyptic number.

43972231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43972231 is an equidigital number, since it uses as much as digits as its factorization.

43972231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 43972231 is about 6631.1560832181. The cubic root of 43972231 is about 352.9605495373.

The spelling of 43972231 in words is "forty-three million, nine hundred seventy-two thousand, two hundred thirty-one".