531331144 has 8 divisors (see below), whose sum is σ = 996245910. Its totient is φ = 265665568.

The previous prime is 531331139. The next prime is 531331147. The reversal of 531331144 is 441133135.

It can be written as a sum of positive squares in only one way, i.e., 348270244 + 183060900 = 18662^2 + 13530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (531331147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33208189 + ... + 33208204.

Almost surely, 2^531331144 is an apocalyptic number.

It is an amenable number.

531331144 is a deficient number, since it is larger than the sum of its proper divisors (464914766).

531331144 is a wasteful number, since it uses less digits than its factorization.

531331144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66416399 (or 66416395 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 531331144 is about 23050.6213365280. The cubic root of 531331144 is about 809.9441835236.

Adding to 531331144 its reverse (441133135), we get a palindrome (972464279).

The spelling of 531331144 in words is "five hundred thirty-one million, three hundred thirty-one thousand, one hundred forty-four".