125543452431 has 4 divisors (see below), whose sum is σ = 167391269912. Its totient is φ = 83695634952.

The previous prime is 125543452423. The next prime is 125543452453. The reversal of 125543452431 is 134254345521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134254345521 = 3 ⋅44751448507.

It is not a de Polignac number, because 125543452431 - 2³ = 125543452423 is a prime.

It is a super-2 number, since 2×125543452431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125543452431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125543452231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20923908736 + ... + 20923908741.

It is an arithmetic number, because the mean of its divisors is an integer number (41847817478).

Almost surely, 2^125543452431 is an apocalyptic number.

125543452431 is a deficient number, since it is larger than the sum of its proper divisors (41847817481).

125543452431 is an equidigital number, since it uses as much as digits as its factorization.

125543452431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41847817480.

The product of its digits is 288000, while the sum is 39.

Adding to 125543452431 its reverse (134254345521), we get a palindrome (259797797952).

The spelling of 125543452431 in words is "one hundred twenty-five billion, five hundred forty-three million, four hundred fifty-two thousand, four hundred thirty-one".