531009125541 has 24 divisors (see below), whose sum is σ = 775691691840. Its totient is φ = 350001237696.

The previous prime is 531009125539. The next prime is 531009125677. The reversal of 531009125541 is 145521900135.

It is a happy number.

531009125541 is a `hidden beast` number, since 5 + 3 + 1 + 0 + 0 + 91 + 25 + 541 = 666.

It is not a de Polignac number, because 531009125541 - 2¹ = 531009125539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531009125496 and 531009125505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531009125341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19276720 + ... + 19304246.

It is an arithmetic number, because the mean of its divisors is an integer number (32320487160).

Almost surely, 2^531009125541 is an apocalyptic number.

It is an amenable number.

531009125541 is a deficient number, since it is larger than the sum of its proper divisors (244682566299).

531009125541 is a wasteful number, since it uses less digits than its factorization.

531009125541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51705 (or 51702 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 531009125541 in words is "five hundred thirty-one billion, nine million, one hundred twenty-five thousand, five hundred forty-one".