43401031 has 2 divisors, whose sum is σ = 43401032. Its totient is φ = 43401030.

The previous prime is 43400999. The next prime is 43401047. The reversal of 43401031 is 13010434.

It is an a-pointer prime, because the next prime (43401047) can be obtained adding 43401031 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43401031 - 2⁵ = 43400999 is a prime.

It is a super-2 number, since 2×43401031² = 3767298983725922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43400996 and 43401014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43401091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700515 + 21700516.

It is an arithmetic number, because the mean of its divisors is an integer number (21700516).

Almost surely, 2^43401031 is an apocalyptic number.

43401031 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401031 is an equidigital number, since it uses as much as digits as its factorization.

43401031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 43401031 is about 6587.9458862380. The cubic root of 43401031 is about 351.4255626196.

Adding to 43401031 its reverse (13010434), we get a palindrome (56411465).

The spelling of 43401031 in words is "forty-three million, four hundred one thousand, thirty-one".