43311630431 has 2 divisors, whose sum is σ = 43311630432. Its totient is φ = 43311630430.

The previous prime is 43311630419. The next prime is 43311630499. The reversal of 43311630431 is 13403611334.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43311630431 - 2²² = 43307436127 is a prime.

It is a super-2 number, since 2×43311630431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43311630394 and 43311630403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43311630931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21655815215 + 21655815216.

It is an arithmetic number, because the mean of its divisors is an integer number (21655815216).

Almost surely, 2^43311630431 is an apocalyptic number.

43311630431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43311630431 is an equidigital number, since it uses as much as digits as its factorization.

43311630431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 43311630431 in words is "forty-three billion, three hundred eleven million, six hundred thirty thousand, four hundred thirty-one".