131018775 has 24 divisors (see below), whose sum is σ = 228021120. Its totient is φ = 66198240.

The previous prime is 131018753. The next prime is 131018777. The reversal of 131018775 is 577810131.

It is not a de Polignac number, because 131018775 - 2⁵ = 131018743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131018777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44547 + ... + 47396.

It is an arithmetic number, because the mean of its divisors is an integer number (9500880).

Almost surely, 2^131018775 is an apocalyptic number.

131018775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131018775 is a deficient number, since it is larger than the sum of its proper divisors (97002345).

131018775 is a wasteful number, since it uses less digits than its factorization.

131018775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91975 (or 91970 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 33.

The square root of 131018775 is about 11446.3433025574. The cubic root of 131018775 is about 507.8995696540.

The spelling of 131018775 in words is "one hundred thirty-one million, eighteen thousand, seven hundred seventy-five".