531500049 has 22 divisors (see below), whose sum is σ = 797334146. Its totient is φ = 354294000.

The previous prime is 531500041. The next prime is 531500063. The reversal of 531500049 is 940005135.

It can be written as a sum of positive squares in only one way, i.e., 377913600 + 153586449 = 19440^2 + 12393^2 .

It is not a de Polignac number, because 531500049 - 2³ = 531500041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531499995 and 531500031.

It is not an unprimeable number, because it can be changed into a prime (531500041) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 54549 + ... + 63549.

Almost surely, 2^531500049 is an apocalyptic number.

It is an amenable number.

531500049 is a deficient number, since it is larger than the sum of its proper divisors (265834097).

531500049 is an frugal number, since it uses more digits than its factorization.

531500049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031 (or 9004 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 531500049 is about 23054.2848295062. The cubic root of 531500049 is about 810.0299988890.

The spelling of 531500049 in words is "five hundred thirty-one million, five hundred thousand, forty-nine".