2688748531 has 16 divisors (see below), whose sum is σ = 3188736000. Its totient is φ = 2265562824.

The previous prime is 2688748519. The next prime is 2688748549. The reversal of 2688748531 is 1358478862.

It is not a de Polignac number, because 2688748531 - 2²³ = 2680359923 is a prime.

It is a super-2 number, since 2×2688748531² = 14458737325909315922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688748561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46195 + ... + 86668.

It is an arithmetic number, because the mean of its divisors is an integer number (199296000).

Almost surely, 2^2688748531 is an apocalyptic number.

2688748531 is a deficient number, since it is larger than the sum of its proper divisors (499987469).

2688748531 is an equidigital number, since it uses as much as digits as its factorization.

2688748531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132943 (or 132929 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 2688748531 is about 51853.1438873286. The cubic root of 2688748531 is about 1390.5397091559.

The spelling of 2688748531 in words is "two billion, six hundred eighty-eight million, seven hundred forty-eight thousand, five hundred thirty-one".