43513689631 has 2 divisors, whose sum is σ = 43513689632. Its totient is φ = 43513689630.

The previous prime is 43513689503. The next prime is 43513689647. The reversal of 43513689631 is 13698631534.

43513689631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43513689631 - 2⁷ = 43513689503 is a prime.

It is a super-2 number, since 2×43513689631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43513689671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21756844815 + 21756844816.

It is an arithmetic number, because the mean of its divisors is an integer number (21756844816).

Almost surely, 2^43513689631 is an apocalyptic number.

43513689631 is a deficient number, since it is larger than the sum of its proper divisors (1).

43513689631 is an equidigital number, since it uses as much as digits as its factorization.

43513689631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The spelling of 43513689631 in words is "forty-three billion, five hundred thirteen million, six hundred eighty-nine thousand, six hundred thirty-one".