125502347431 has 4 divisors (see below), whose sum is σ = 125580155832. Its totient is φ = 125424539032.

The previous prime is 125502347419. The next prime is 125502347489. The reversal of 125502347431 is 134743205521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125502347431 - 2¹¹ = 125502345383 is a prime.

It is a super-2 number, since 2×125502347431² (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 (125502047431) 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 in 3 ways as a sum of consecutive naturals, for example, 38901781 + ... + 38905006.

It is an arithmetic number, because the mean of its divisors is an integer number (31395038958).

Almost surely, 2^125502347431 is an apocalyptic number.

125502347431 is a deficient number, since it is larger than the sum of its proper divisors (77808401).

125502347431 is an equidigital number, since it uses as much as digits as its factorization.

125502347431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77808400.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 125502347431 in words is "one hundred twenty-five billion, five hundred two million, three hundred forty-seven thousand, four hundred thirty-one".