131551111 has 8 divisors (see below), whose sum is σ = 132549920. Its totient is φ = 130556448.

The previous prime is 131551081. The next prime is 131551127. The reversal of 131551111 is 111155131.

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

It is a cyclic number.

It is not a de Polignac number, because 131551111 - 2¹⁷ = 131420039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131551171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90190 + ... + 91636.

It is an arithmetic number, because the mean of its divisors is an integer number (16568740).

Almost surely, 2^131551111 is an apocalyptic number.

131551111 is a deficient number, since it is larger than the sum of its proper divisors (998809).

131551111 is a wasteful number, since it uses less digits than its factorization.

131551111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073.

The product of its digits is 75, while the sum is 19.

The square root of 131551111 is about 11469.5732701788. The cubic root of 131551111 is about 508.5865141257.

The spelling of 131551111 in words is "one hundred thirty-one million, five hundred fifty-one thousand, one hundred eleven".