131403218 has 16 divisors (see below), whose sum is σ = 202378176. Its totient is φ = 63963120.

The previous prime is 131403143. The next prime is 131403253. The reversal of 131403218 is 812304131.

It is a junction number, because it is equal to n+sod(n) for n = 131403193 and 131403202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9155 + ... + 18617.

It is an arithmetic number, because the mean of its divisors is an integer number (12648636).

Almost surely, 2^131403218 is an apocalyptic number.

131403218 is a deficient number, since it is larger than the sum of its proper divisors (70974958).

131403218 is a wasteful number, since it uses less digits than its factorization.

131403218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9649.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 131403218 is about 11463.1242687149. The cubic root of 131403218 is about 508.3958541633.

Adding to 131403218 its reverse (812304131), we get a palindrome (943707349).

The spelling of 131403218 in words is "one hundred thirty-one million, four hundred three thousand, two hundred eighteen".