5131686 has 32 divisors (see below), whose sum is σ = 11927808. Its totient is φ = 1441440.

The previous prime is 5131673. The next prime is 5131697. The reversal of 5131686 is 6861315.

5131686 is nontrivially palindromic in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1561 + ... + 3563.

It is an arithmetic number, because the mean of its divisors is an integer number (372744).

Almost surely, 2^5131686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5131686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5963904).

5131686 is an abundant number, since it is smaller than the sum of its proper divisors (6796122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5131686 is a wasteful number, since it uses less digits than its factorization.

5131686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its digits is 4320, while the sum is 30.

The square root of 5131686 is about 2265.3224935978. The cubic root of 5131686 is about 172.4858043349.

The spelling of 5131686 in words is "five million, one hundred thirty-one thousand, six hundred eighty-six".