131522775 has 12 divisors (see below), whose sum is σ = 217451112. Its totient is φ = 70145440.

The previous prime is 131522759. The next prime is 131522777. The reversal of 131522775 is 577225131.

It is a happy number.

It is not a de Polignac number, because 131522775 - 2⁴ = 131522759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131522777) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 876744 + ... + 876893.

It is an arithmetic number, because the mean of its divisors is an integer number (18120926).

Almost surely, 2^131522775 is an apocalyptic number.

131522775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131522775 is a deficient number, since it is larger than the sum of its proper divisors (85928337).

131522775 is a wasteful number, since it uses less digits than its factorization.

131522775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753650 (or 1753645 counting only the distinct ones).

The product of its digits is 14700, while the sum is 33.

The square root of 131522775 is about 11468.3379353767. The cubic root of 131522775 is about 508.5499951327.

It can be divided in two parts, 1315 and 22775, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 131522775 in words is "one hundred thirty-one million, five hundred twenty-two thousand, seven hundred seventy-five".