131330305406 has 4 divisors (see below), whose sum is σ = 196995458112. Its totient is φ = 65665152702.

The previous prime is 131330305397. The next prime is 131330305439. The reversal of 131330305406 is 604503033131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 604503033131 = 11321 ⋅53396611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32832576350 + ... + 32832576353.

It is an arithmetic number, because the mean of its divisors is an integer number (49248864528).

Almost surely, 2^131330305406 is an apocalyptic number.

131330305406 is a deficient number, since it is larger than the sum of its proper divisors (65665152706).

131330305406 is an equidigital number, since it uses as much as digits as its factorization.

131330305406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65665152705.

The product of its (nonzero) digits is 9720, while the sum is 29.

Adding to 131330305406 its reverse (604503033131), we get a palindrome (735833338537).

The spelling of 131330305406 in words is "one hundred thirty-one billion, three hundred thirty million, three hundred five thousand, four hundred six".