531033640 has 32 divisors (see below), whose sum is σ = 1223971560. Its totient is φ = 207232000.

The previous prime is 531033631. The next prime is 531033649. The reversal of 531033640 is 46330135.

It is an interprime number because it is at equal distance from previous prime (531033631) and next prime (531033649).

It can be written as a sum of positive squares in 4 ways, for example, as 394657956 + 136375684 = 19866^2 + 11678^2 .

It is not an unprimeable number, because it can be changed into a prime (531033649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160261 + ... + 163540.

Almost surely, 2^531033640 is an apocalyptic number.

It is an amenable number.

531033640 is an abundant number, since it is smaller than the sum of its proper divisors (692937920).

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

531033640 is a wasteful number, since it uses less digits than its factorization.

531033640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323853 (or 323849 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 531033640 is about 23044.1671578732. The cubic root of 531033640 is about 809.7929867767.

Adding to 531033640 its reverse (46330135), we get a palindrome (577363775).

The spelling of 531033640 in words is "five hundred thirty-one million, thirty-three thousand, six hundred forty".