131031001 has 4 divisors (see below), whose sum is σ = 131184400. Its totient is φ = 130877604.

The previous prime is 131030993. The next prime is 131031007. The reversal of 131031001 is 100130131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100130131 = 1361 ⋅73571.

It is a cyclic number.

It is not a de Polignac number, because 131031001 - 2³ = 131030993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131031007) 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, 75411 + ... + 77128.

It is an arithmetic number, because the mean of its divisors is an integer number (32796100).

Almost surely, 2^131031001 is an apocalyptic number.

It is an amenable number.

131031001 is a deficient number, since it is larger than the sum of its proper divisors (153399).

131031001 is an equidigital number, since it uses as much as digits as its factorization.

131031001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153398.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 131031001 is about 11446.8773471196. The cubic root of 131031001 is about 507.9153673568.

Adding to 131031001 its reverse (100130131), we get a palindrome (231161132).

The spelling of 131031001 in words is "one hundred thirty-one million, thirty-one thousand, one".