131023406 has 8 divisors (see below), whose sum is σ = 196754520. Its totient is φ = 65438568.

The previous prime is 131023381. The next prime is 131023423. The reversal of 131023406 is 604320131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34301 + ... + 37928.

It is an arithmetic number, because the mean of its divisors is an integer number (24594315).

Almost surely, 2^131023406 is an apocalyptic number.

131023406 is a deficient number, since it is larger than the sum of its proper divisors (65731114).

131023406 is an equidigital number, since it uses as much as digits as its factorization.

131023406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73138.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 131023406 is about 11446.5455924484. The cubic root of 131023406 is about 507.9055536696.

Adding to 131023406 its reverse (604320131), we get a palindrome (735343537).

The spelling of 131023406 in words is "one hundred thirty-one million, twenty-three thousand, four hundred six".