531139682 has 4 divisors (see below), whose sum is σ = 796709526. Its totient is φ = 265569840.

The previous prime is 531139639. The next prime is 531139729. The reversal of 531139682 is 286931135.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 289306081 + 241833601 = 17009^2 + 15551^2 .

It is a super-2 number, since 2×531139682² = 564218723590122248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132784919 + ... + 132784922.

Almost surely, 2^531139682 is an apocalyptic number.

531139682 is a deficient number, since it is larger than the sum of its proper divisors (265569844).

531139682 is a wasteful number, since it uses less digits than its factorization.

531139682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265569843.

The product of its digits is 38880, while the sum is 38.

The square root of 531139682 is about 23046.4678855568. The cubic root of 531139682 is about 809.8468856550.

The spelling of 531139682 in words is "five hundred thirty-one million, one hundred thirty-nine thousand, six hundred eighty-two".