43400004131 has 16 divisors (see below), whose sum is σ = 47877994080. Its totient is φ = 39011527680.

The previous prime is 43400004013. The next prime is 43400004149. The reversal of 43400004131 is 13140000434.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 43400004131 - 2³⁴ = 26220134947 is a prime.

It is a super-2 number, since 2×43400004131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43400004161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164965 + ... + 1201641.

It is an arithmetic number, because the mean of its divisors is an integer number (2992374630).

Almost surely, 2^43400004131 is an apocalyptic number.

43400004131 is a deficient number, since it is larger than the sum of its proper divisors (4477989949).

43400004131 is a wasteful number, since it uses less digits than its factorization.

43400004131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37894.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 43400004131 its reverse (13140000434), we get a palindrome (56540004565).

The spelling of 43400004131 in words is "forty-three billion, four hundred million, four thousand, one hundred thirty-one".