131026331 has 8 divisors (see below), whose sum is σ = 137769984. Its totient is φ = 124369960.

The previous prime is 131026309. The next prime is 131026333. The reversal of 131026331 is 133620131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131026331 is a prime.

It is a super-2 number, since 2×131026331² = 34335798830643122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131026333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18731 + ... + 24756.

It is an arithmetic number, because the mean of its divisors is an integer number (17221248).

Almost surely, 2^131026331 is an apocalyptic number.

131026331 is a deficient number, since it is larger than the sum of its proper divisors (6743653).

131026331 is a wasteful number, since it uses less digits than its factorization.

131026331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43641.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 131026331 is about 11446.6733595399. The cubic root of 131026331 is about 507.9093331793.

Adding to 131026331 its reverse (133620131), we get a palindrome (264646462).

The spelling of 131026331 in words is "one hundred thirty-one million, twenty-six thousand, three hundred thirty-one".