131405885 has 8 divisors (see below), whose sum is σ = 169816920. Its totient is φ = 97038144.

The previous prime is 131405867. The next prime is 131405891. The reversal of 131405885 is 588504131.

It can be written as a sum of positive squares in 4 ways, for example, as 7150276 + 124255609 = 2674^2 + 11147^2 .

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 131405885 - 2⁶ = 131405821 is a prime.

It is a super-3 number, since 3×131405885³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1010750 + ... + 1010879.

It is an arithmetic number, because the mean of its divisors is an integer number (21227115).

Almost surely, 2^131405885 is an apocalyptic number.

It is an amenable number.

131405885 is a deficient number, since it is larger than the sum of its proper divisors (38411035).

131405885 is a wasteful number, since it uses less digits than its factorization.

131405885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021647.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 131405885 is about 11463.2405976670. The cubic root of 131405885 is about 508.3992936594.

The spelling of 131405885 in words is "one hundred thirty-one million, four hundred five thousand, eight hundred eighty-five".