43401131 has 2 divisors, whose sum is σ = 43401132. Its totient is φ = 43401130.

The previous prime is 43401109. The next prime is 43401151. The reversal of 43401131 is 13110434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43401131 - 2⁶ = 43401067 is a prime.

It is a super-2 number, since 2×43401131² = 3767316344158322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43401101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700565 + 21700566.

It is an arithmetic number, because the mean of its divisors is an integer number (21700566).

Almost surely, 2^43401131 is an apocalyptic number.

43401131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401131 is an equidigital number, since it uses as much as digits as its factorization.

43401131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 43401131 is about 6587.9534758527. The cubic root of 43401131 is about 351.4258325251.

Adding to 43401131 its reverse (13110434), we get a palindrome (56511565).

The spelling of 43401131 in words is "forty-three million, four hundred one thousand, one hundred thirty-one".