43139647451 has 2 divisors, whose sum is σ = 43139647452. Its totient is φ = 43139647450.

The previous prime is 43139647427. The next prime is 43139647483. The reversal of 43139647451 is 15474693134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43139647451 - 2²² = 43135453147 is a prime.

It is a super-2 number, since 2×43139647451² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43139647396 and 43139647405.

It is not a weakly prime, because it can be changed into another prime (43139647051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21569823725 + 21569823726.

It is an arithmetic number, because the mean of its divisors is an integer number (21569823726).

Almost surely, 2^43139647451 is an apocalyptic number.

43139647451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43139647451 is an equidigital number, since it uses as much as digits as its factorization.

43139647451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 47.

The spelling of 43139647451 in words is "forty-three billion, one hundred thirty-nine million, six hundred forty-seven thousand, four hundred fifty-one".