125535031231 has 4 divisors (see below), whose sum is σ = 125535829464. Its totient is φ = 125534233000.

The previous prime is 125535031199. The next prime is 125535031253. The reversal of 125535031231 is 132130535521.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 125535031231 - 2⁵ = 125535031199 is a prime.

It is a super-2 number, since 2×125535031231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125535031193 and 125535031202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125535031031) 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, 76045 + ... + 506806.

It is an arithmetic number, because the mean of its divisors is an integer number (31383957366).

Almost surely, 2^125535031231 is an apocalyptic number.

125535031231 is a deficient number, since it is larger than the sum of its proper divisors (798233).

125535031231 is an equidigital number, since it uses as much as digits as its factorization.

125535031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798232.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 125535031231 its reverse (132130535521), we get a palindrome (257665566752).

The spelling of 125535031231 in words is "one hundred twenty-five billion, five hundred thirty-five million, thirty-one thousand, two hundred thirty-one".