531244540 has 12 divisors (see below), whose sum is σ = 1115613576. Its totient is φ = 212497808.

The previous prime is 531244537. The next prime is 531244559. The reversal of 531244540 is 45442135.

It is a super-2 number, since 2×531244540² = 564441522559623200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531244499 and 531244508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13281094 + ... + 13281133.

It is an arithmetic number, because the mean of its divisors is an integer number (92967798).

Almost surely, 2^531244540 is an apocalyptic number.

It is an amenable number.

531244540 is an abundant number, since it is smaller than the sum of its proper divisors (584369036).

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

531244540 is a wasteful number, since it uses less digits than its factorization.

531244540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26562236 (or 26562234 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 531244540 is about 23048.7426988979. The cubic root of 531244540 is about 809.9001756776.

Adding to 531244540 its reverse (45442135), we get a palindrome (576686675).

The spelling of 531244540 in words is "five hundred thirty-one million, two hundred forty-four thousand, five hundred forty".