531156641 has 16 divisors (see below), whose sum is σ = 560127744. Its totient is φ = 502713024.

The previous prime is 531156631. The next prime is 531156649. The reversal of 531156641 is 146651135.

It is not a de Polignac number, because 531156641 - 2¹⁰ = 531155617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 531156598 and 531156607.

It is not an unprimeable number, because it can be changed into a prime (531156649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1675415 + ... + 1675731.

It is an arithmetic number, because the mean of its divisors is an integer number (35007984).

Almost surely, 2^531156641 is an apocalyptic number.

It is an amenable number.

531156641 is a deficient number, since it is larger than the sum of its proper divisors (28971103).

531156641 is a wasteful number, since it uses less digits than its factorization.

531156641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880.

The product of its digits is 10800, while the sum is 32.

The square root of 531156641 is about 23046.8358131870. The cubic root of 531156641 is about 809.8555048862.

The spelling of 531156641 in words is "five hundred thirty-one million, one hundred fifty-six thousand, six hundred forty-one".