131311026 has 96 divisors (see below), whose sum is σ = 375643008. Its totient is φ = 32094720.

The previous prime is 131311001. The next prime is 131311027. The reversal of 131311026 is 620113131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (131311027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20776 + ... + 26348.

It is an arithmetic number, because the mean of its divisors is an integer number (3912948).

Almost surely, 2^131311026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131311026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187821504).

131311026 is an abundant number, since it is smaller than the sum of its proper divisors (244331982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131311026 is a wasteful number, since it uses less digits than its factorization.

131311026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5616 (or 5613 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 131311026 is about 11459.1023208627. The cubic root of 131311026 is about 508.2769301449.

Adding to 131311026 its reverse (620113131), we get a palindrome (751424157).

The spelling of 131311026 in words is "one hundred thirty-one million, three hundred eleven thousand, twenty-six".