135444430431 has 6 divisors (see below), whose sum is σ = 195641955080. Its totient is φ = 90296286948.

The previous prime is 135444430411. The next prime is 135444430453. The reversal of 135444430431 is 134034444531.

135444430431 is a `hidden beast` number, since 1 + 3 + 544 + 44 + 30 + 43 + 1 = 666.

It is not a de Polignac number, because 135444430431 - 2⁵ = 135444430399 is a prime.

It is a super-2 number, since 2×135444430431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135444430411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7524690571 + ... + 7524690588.

Almost surely, 2^135444430431 is an apocalyptic number.

135444430431 is a deficient number, since it is larger than the sum of its proper divisors (60197524649).

135444430431 is a wasteful number, since it uses less digits than its factorization.

135444430431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15049381165 (or 15049381162 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 135444430431 its reverse (134034444531), we get a palindrome (269478874962).

The spelling of 135444430431 in words is "one hundred thirty-five billion, four hundred forty-four million, four hundred thirty thousand, four hundred thirty-one".