131024015531 has 4 divisors (see below), whose sum is σ = 131156230464. Its totient is φ = 130891800600.

The previous prime is 131024015509. The next prime is 131024015651. The reversal of 131024015531 is 135510420131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135510420131 = 23 ⋅5891757397.

It is a cyclic number.

It is not a de Polignac number, because 131024015531 - 2¹⁴ = 131023999147 is a prime.

It is a super-2 number, since 2×131024015531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131024015531.

It is not an unprimeable number, because it can be changed into a prime (131024015501) 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, 66105980 + ... + 66107961.

It is an arithmetic number, because the mean of its divisors is an integer number (32789057616).

Almost surely, 2^131024015531 is an apocalyptic number.

131024015531 is a deficient number, since it is larger than the sum of its proper divisors (132214933).

131024015531 is an equidigital number, since it uses as much as digits as its factorization.

131024015531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132214932.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 131024015531 its reverse (135510420131), we get a palindrome (266534435662).

The spelling of 131024015531 in words is "one hundred thirty-one billion, twenty-four million, fifteen thousand, five hundred thirty-one".