131103621 has 36 divisors (see below), whose sum is σ = 209969760. Its totient is φ = 78764400.

The previous prime is 131103613. The next prime is 131103631. The reversal of 131103621 is 126301131.

131103621 is a `hidden beast` number, since 1 + 31 + 10 + 3 + 621 = 666.

It is not a de Polignac number, because 131103621 - 2³ = 131103613 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131103594 and 131103603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131103601) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142200 + ... + 143118.

Almost surely, 2^131103621 is an apocalyptic number.

131103621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131103621 is a deficient number, since it is larger than the sum of its proper divisors (78866139).

131103621 is a wasteful number, since it uses less digits than its factorization.

131103621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 131103621 is about 11450.0489518604. The cubic root of 131103621 is about 508.0091823107.

Adding to 131103621 its reverse (126301131), we get a palindrome (257404752).

The spelling of 131103621 in words is "one hundred thirty-one million, one hundred three thousand, six hundred twenty-one".