131621446 has 16 divisors (see below), whose sum is σ = 228050640. Its totient is φ = 56308480.

The previous prime is 131621437. The next prime is 131621471. The reversal of 131621446 is 644126131.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 175591 + ... + 176338.

It is an arithmetic number, because the mean of its divisors is an integer number (14253165).

Almost surely, 2^131621446 is an apocalyptic number.

131621446 is a deficient number, since it is larger than the sum of its proper divisors (96429194).

131621446 is a wasteful number, since it uses less digits than its factorization.

131621446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351959.

The product of its digits is 3456, while the sum is 28.

The square root of 131621446 is about 11472.6390163728. The cubic root of 131621446 is about 508.6771381144.

Adding to 131621446 its reverse (644126131), we get a palindrome (775747577).

The spelling of 131621446 in words is "one hundred thirty-one million, six hundred twenty-one thousand, four hundred forty-six".