43211402431 has 2 divisors, whose sum is σ = 43211402432. Its totient is φ = 43211402430.

The previous prime is 43211402407. The next prime is 43211402557. The reversal of 43211402431 is 13420411234.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43211402431 - 2²³ = 43203013823 is a prime.

It is a super-2 number, since 2×43211402431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43211402396 and 43211402405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43211402131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605701215 + 21605701216.

It is an arithmetic number, because the mean of its divisors is an integer number (21605701216).

Almost surely, 2^43211402431 is an apocalyptic number.

43211402431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43211402431 is an equidigital number, since it uses as much as digits as its factorization.

43211402431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 43211402431 its reverse (13420411234), we get a palindrome (56631813665).

The spelling of 43211402431 in words is "forty-three billion, two hundred eleven million, four hundred two thousand, four hundred thirty-one".