131407569 has 32 divisors (see below), whose sum is σ = 209255040. Its totient is φ = 81202176.

The previous prime is 131407561. The next prime is 131407571. The reversal of 131407569 is 965704131.

It is not a de Polignac number, because 131407569 - 2³ = 131407561 is a prime.

It is a super-3 number, since 3×131407569³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (131407561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28617 + ... + 32889.

It is an arithmetic number, because the mean of its divisors is an integer number (6539220).

Almost surely, 2^131407569 is an apocalyptic number.

It is an amenable number.

131407569 is a deficient number, since it is larger than the sum of its proper divisors (77847471).

131407569 is a wasteful number, since it uses less digits than its factorization.

131407569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366 (or 4360 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 131407569 is about 11463.3140496106. The cubic root of 131407569 is about 508.4014654057.

The spelling of 131407569 in words is "one hundred thirty-one million, four hundred seven thousand, five hundred sixty-nine".