531621005311 has 24 divisors (see below), whose sum is σ = 586485725904. Its totient is φ = 477898813440.

The previous prime is 531621005219. The next prime is 531621005329. The reversal of 531621005311 is 113500126135.

It is not a de Polignac number, because 531621005311 - 2⁹ = 531621004799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531621005311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531621005911) 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, 54615601 + ... + 54625333.

It is an arithmetic number, because the mean of its divisors is an integer number (24436905246).

Almost surely, 2^531621005311 is an apocalyptic number.

531621005311 is a deficient number, since it is larger than the sum of its proper divisors (54864720593).

531621005311 is a wasteful number, since it uses less digits than its factorization.

531621005311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279 (or 10140 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The spelling of 531621005311 in words is "five hundred thirty-one billion, six hundred twenty-one million, five thousand, three hundred eleven".