531221044 has 6 divisors (see below), whose sum is σ = 929636834. Its totient is φ = 265610520.

The previous prime is 531221039. The next prime is 531221107. The reversal of 531221044 is 440122135.

It can be written as a sum of positive squares in only one way, i.e., 421809444 + 109411600 = 20538^2 + 10460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66402627 + ... + 66402634.

Almost surely, 2^531221044 is an apocalyptic number.

It is an amenable number.

531221044 is a deficient number, since it is larger than the sum of its proper divisors (398415790).

531221044 is a wasteful number, since it uses less digits than its factorization.

531221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132805265 (or 132805263 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 531221044 is about 23048.2329908390. The cubic root of 531221044 is about 809.8882353541. Note that the first 3 decimals are identical.

Adding to 531221044 its reverse (440122135), we get a palindrome (971343179).

The spelling of 531221044 in words is "five hundred thirty-one million, two hundred twenty-one thousand, forty-four".