43406777131 has 2 divisors, whose sum is σ = 43406777132. Its totient is φ = 43406777130.

The previous prime is 43406777101. The next prime is 43406777137. The reversal of 43406777131 is 13177760434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43406777131 - 2³³ = 34816842539 is a prime.

It is a super-2 number, since 2×43406777131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43406777137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21703388565 + 21703388566.

It is an arithmetic number, because the mean of its divisors is an integer number (21703388566).

Almost surely, 2^43406777131 is an apocalyptic number.

43406777131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43406777131 is an equidigital number, since it uses as much as digits as its factorization.

43406777131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 43406777131 in words is "forty-three billion, four hundred six million, seven hundred seventy-seven thousand, one hundred thirty-one".