131024431505 has 32 divisors (see below), whose sum is σ = 180785468160. Its totient is φ = 90268622080.

The previous prime is 131024431501. The next prime is 131024431519. The reversal of 131024431505 is 505134420131.

It is not a de Polignac number, because 131024431505 - 2² = 131024431501 is a prime.

It is a super-3 number, since 3×131024431505³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (131024431501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690437 + ... + 859506.

It is an arithmetic number, because the mean of its divisors is an integer number (5649545880).

Almost surely, 2^131024431505 is an apocalyptic number.

It is an amenable number.

131024431505 is a deficient number, since it is larger than the sum of its proper divisors (49761036655).

131024431505 is a wasteful number, since it uses less digits than its factorization.

131024431505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550041.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 131024431505 its reverse (505134420131), we get a palindrome (636158851636).

The spelling of 131024431505 in words is "one hundred thirty-one billion, twenty-four million, four hundred thirty-one thousand, five hundred five".