131471685 has 12 divisors (see below), whose sum is σ = 227884332. Its totient is φ = 70118208.

The previous prime is 131471579. The next prime is 131471687. The reversal of 131471685 is 586174131.

It can be written as a sum of positive squares in 2 ways, for example, as 99560484 + 31911201 = 9978^2 + 5649^2 .

It is not a de Polignac number, because 131471685 - 2¹⁴ = 131455301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131471687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1460752 + ... + 1460841.

It is an arithmetic number, because the mean of its divisors is an integer number (18990361).

Almost surely, 2^131471685 is an apocalyptic number.

131471685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131471685 is a deficient number, since it is larger than the sum of its proper divisors (96412647).

131471685 is a wasteful number, since it uses less digits than its factorization.

131471685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921604 (or 2921601 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 131471685 is about 11466.1102820442. The cubic root of 131471685 is about 508.4841378843.

The spelling of 131471685 in words is "one hundred thirty-one million, four hundred seventy-one thousand, six hundred eighty-five".