130331402 has 4 divisors (see below), whose sum is σ = 195497106. Its totient is φ = 65165700.

The previous prime is 130331389. The next prime is 130331407. The reversal of 130331402 is 204133031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204133031 = 113 ⋅1806487.

It can be written as a sum of positive squares in only one way, i.e., 98982601 + 31348801 = 9949^2 + 5599^2 .

It is not an unprimeable number, because it can be changed into a prime (130331407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32582849 + ... + 32582852.

Almost surely, 2^130331402 is an apocalyptic number.

130331402 is a deficient number, since it is larger than the sum of its proper divisors (65165704).

130331402 is an equidigital number, since it uses as much as digits as its factorization.

130331402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65165703.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 130331402 is about 11416.2779398541. The cubic root of 130331402 is about 507.0098020920.

Adding to 130331402 its reverse (204133031), we get a palindrome (334464433).

The spelling of 130331402 in words is "one hundred thirty million, three hundred thirty-one thousand, four hundred two".