131203001 has 4 divisors (see below), whose sum is σ = 131234532. Its totient is φ = 131171472.

The previous prime is 131202949. The next prime is 131203003. The reversal of 131203001 is 100302131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100302131 = 941 ⋅106591.

It can be written as a sum of positive squares in 2 ways, for example, as 83247376 + 47955625 = 9124^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 131203001 - 2¹⁴ = 131186617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131203003) 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, 8366 + ... + 18231.

It is an arithmetic number, because the mean of its divisors is an integer number (32808633).

Almost surely, 2^131203001 is an apocalyptic number.

It is an amenable number.

131203001 is a deficient number, since it is larger than the sum of its proper divisors (31531).

131203001 is an equidigital number, since it uses as much as digits as its factorization.

131203001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31530.

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

The square root of 131203001 is about 11454.3878492043. The cubic root of 131203001 is about 508.1375113402.

Adding to 131203001 its reverse (100302131), we get a palindrome (231505132).

The spelling of 131203001 in words is "one hundred thirty-one million, two hundred three thousand, one".