331131001 has 4 divisors (see below), whose sum is σ = 331169104. Its totient is φ = 331092900.

The previous prime is 331130999. The next prime is 331131011. The reversal of 331131001 is 100131133.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 100131133 = 43 ⋅2328631.

It is a cyclic number.

It is not a de Polignac number, because 331131001 - 2¹ = 331130999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331131011) 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, 1066 + ... + 25756.

It is an arithmetic number, because the mean of its divisors is an integer number (82792276).

Almost surely, 2^331131001 is an apocalyptic number.

It is an amenable number.

331131001 is a deficient number, since it is larger than the sum of its proper divisors (38103).

331131001 is a wasteful number, since it uses less digits than its factorization.

331131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38102.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 331131001 is about 18197.0052755941. The cubic root of 331131001 is about 691.8308870110.

Adding to 331131001 its reverse (100131133), we get a palindrome (431262134).

The spelling of 331131001 in words is "three hundred thirty-one million, one hundred thirty-one thousand, one".