131128538 has 8 divisors (see below), whose sum is σ = 207045120. Its totient is φ = 62113500.

The previous prime is 131128507. The next prime is 131128541. The reversal of 131128538 is 835821131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725338 + ... + 1725413.

It is an arithmetic number, because the mean of its divisors is an integer number (25880640).

Almost surely, 2^131128538 is an apocalyptic number.

131128538 is a deficient number, since it is larger than the sum of its proper divisors (75916582).

131128538 is a wasteful number, since it uses less digits than its factorization.

131128538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450772.

The product of its digits is 5760, while the sum is 32.

The square root of 131128538 is about 11451.1369741175. The cubic root of 131128538 is about 508.0413636313.

Adding to 131128538 its reverse (835821131), we get a palindrome (966949669).

The spelling of 131128538 in words is "one hundred thirty-one million, one hundred twenty-eight thousand, five hundred thirty-eight".