43554779131 has 2 divisors, whose sum is σ = 43554779132. Its totient is φ = 43554779130.

The previous prime is 43554779123. The next prime is 43554779179. The reversal of 43554779131 is 13197745534.

43554779131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43554779131 - 2³ = 43554779123 is a prime.

It is a super-2 number, since 2×43554779131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43554779111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21777389565 + 21777389566.

It is an arithmetic number, because the mean of its divisors is an integer number (21777389566).

Almost surely, 2^43554779131 is an apocalyptic number.

43554779131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43554779131 is an equidigital number, since it uses as much as digits as its factorization.

43554779131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 49.

The spelling of 43554779131 in words is "forty-three billion, five hundred fifty-four million, seven hundred seventy-nine thousand, one hundred thirty-one".