131128635 has 64 divisors (see below), whose sum is σ = 241781760. Its totient is φ = 60065280.

The previous prime is 131128609. The next prime is 131128651. The reversal of 131128635 is 536821131.

It is not a de Polignac number, because 131128635 - 2⁷ = 131128507 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 413497 + ... + 413813.

It is an arithmetic number, because the mean of its divisors is an integer number (3777840).

Almost surely, 2^131128635 is an apocalyptic number.

131128635 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131128635 is a deficient number, since it is larger than the sum of its proper divisors (110653125).

131128635 is a wasteful number, since it uses less digits than its factorization.

131128635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 4320, while the sum is 30.

The square root of 131128635 is about 11451.1412095040. The cubic root of 131128635 is about 508.0414889028.

Adding to 131128635 its reverse (536821131), we get a palindrome (667949766).

The spelling of 131128635 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, six hundred thirty-five".