131002002 has 32 divisors (see below), whose sum is σ = 291677760. Its totient is φ = 43583040.

The previous prime is 131001991. The next prime is 131002009. The reversal of 131002002 is 200200131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (131002009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29977 + ... + 34067.

It is an arithmetic number, because the mean of its divisors is an integer number (9114930).

Almost surely, 2^131002002 is an apocalyptic number.

131002002 is an abundant number, since it is smaller than the sum of its proper divisors (160675758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131002002 is a wasteful number, since it uses less digits than its factorization.

131002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4695 (or 4689 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 131002002 is about 11445.6105997015. The cubic root of 131002002 is about 507.8778949919.

Adding to 131002002 its reverse (200200131), we get a palindrome (331202133).

The spelling of 131002002 in words is "one hundred thirty-one million, two thousand, two".