125440543431 has 16 divisors (see below), whose sum is σ = 212386105600. Its totient is φ = 71680310424.

The previous prime is 125440543427. The next prime is 125440543441. The reversal of 125440543431 is 134345044521.

125440543431 is a `hidden beast` number, since 1 + 2 + 544 + 0 + 54 + 34 + 31 = 666.

It is not a de Polignac number, because 125440543431 - 2² = 125440543427 is a prime.

It is a super-2 number, since 2×125440543431² (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 (125440543441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331853101 + ... + 331853478.

It is an arithmetic number, because the mean of its divisors is an integer number (13274131600).

Almost surely, 2^125440543431 is an apocalyptic number.

125440543431 is a deficient number, since it is larger than the sum of its proper divisors (86945562169).

125440543431 is an equidigital number, since it uses as much as digits as its factorization.

125440543431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663706595 (or 663706589 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 125440543431 its reverse (134345044521), we get a palindrome (259785587952).

The spelling of 125440543431 in words is "one hundred twenty-five billion, four hundred forty million, five hundred forty-three thousand, four hundred thirty-one".