125501503131 has 24 divisors (see below), whose sum is σ = 187779006480. Its totient is φ = 80675735616.

The previous prime is 125501503097. The next prime is 125501503181. The reversal of 125501503131 is 131305105521.

125501503131 is a `hidden beast` number, since 1 + 2 + 550 + 1 + 50 + 31 + 31 = 666.

It is not a de Polignac number, because 125501503131 - 2⁷ = 125501503003 is a prime.

It is a super-2 number, since 2×125501503131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125501503095 and 125501503104.

It is not an unprimeable number, because it can be changed into a prime (125501503181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120025 + ... + 515178.

It is an arithmetic number, because the mean of its divisors is an integer number (7824125270).

Almost surely, 2^125501503131 is an apocalyptic number.

125501503131 is a deficient number, since it is larger than the sum of its proper divisors (62277503349).

125501503131 is a wasteful number, since it uses less digits than its factorization.

125501503131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635995 (or 635992 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

Adding to 125501503131 its reverse (131305105521), we get a palindrome (256806608652).

The spelling of 125501503131 in words is "one hundred twenty-five billion, five hundred one million, five hundred three thousand, one hundred thirty-one".