131320001 has 4 divisors (see below), whose sum is σ = 138231600. Its totient is φ = 124408404.

The previous prime is 131319997. The next prime is 131320009. The reversal of 131320001 is 100023131.

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.

It is a cyclic number.

It is not a de Polignac number, because 131320001 - 2² = 131319997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131320009) 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, 3455771 + ... + 3455808.

It is an arithmetic number, because the mean of its divisors is an integer number (34557900).

Almost surely, 2^131320001 is an apocalyptic number.

It is an amenable number.

131320001 is a deficient number, since it is larger than the sum of its proper divisors (6911599).

131320001 is an equidigital number, since it uses as much as digits as its factorization.

131320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6911598.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 131320001 is about 11459.4939242534. The cubic root of 131320001 is about 508.2885099836.

Adding to 131320001 its reverse (100023131), we get a palindrome (231343132).

The spelling of 131320001 in words is "one hundred thirty-one million, three hundred twenty thousand, one".