131203406 has 16 divisors (see below), whose sum is σ = 206829744. Its totient is φ = 62342784.

The previous prime is 131203381. The next prime is 131203451. The reversal of 131203406 is 604302131.

It is a congruent number.

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, 17435 + ... + 23798.

It is an arithmetic number, because the mean of its divisors is an integer number (12926859).

Almost surely, 2^131203406 is an apocalyptic number.

131203406 is a deficient number, since it is larger than the sum of its proper divisors (75626338).

131203406 is a wasteful number, since it uses less digits than its factorization.

131203406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41315.

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

The square root of 131203406 is about 11454.4055280054. The cubic root of 131203406 is about 508.1380341826.

Adding to 131203406 its reverse (604302131), we get a palindrome (735505537).

The spelling of 131203406 in words is "one hundred thirty-one million, two hundred three thousand, four hundred six".