531560221672 has 16 divisors (see below), whose sum is σ = 1003023669060. Its totient is φ = 264087243264.

The previous prime is 531560221651. The next prime is 531560221681. The reversal of 531560221672 is 276122065135.

It can be written as a sum of positive squares in 2 ways, for example, as 457525076836 + 74035144836 = 676406^2 + 272094^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211607113 + ... + 211609624.

Almost surely, 2^531560221672 is an apocalyptic number.

It is an amenable number.

531560221672 is a deficient number, since it is larger than the sum of its proper divisors (471463447388).

531560221672 is a wasteful number, since it uses less digits than its factorization.

531560221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423216900 (or 423216896 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 531560221672 in words is "five hundred thirty-one billion, five hundred sixty million, two hundred twenty-one thousand, six hundred seventy-two".