531540144555 has 32 divisors (see below), whose sum is σ = 971995728384. Its totient is φ = 242980628736.

The previous prime is 531540144547. The next prime is 531540144557. The reversal of 531540144555 is 555441045135.

It is not a de Polignac number, because 531540144555 - 2³ = 531540144547 is a prime.

It is a super-2 number, since 2×531540144555² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531540144557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3268327 + ... + 3427103.

It is an arithmetic number, because the mean of its divisors is an integer number (30374866512).

Almost surely, 2^531540144555 is an apocalyptic number.

531540144555 is a deficient number, since it is larger than the sum of its proper divisors (440455583829).

531540144555 is a wasteful number, since it uses less digits than its factorization.

531540144555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190675.

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 531540144555 in words is "five hundred thirty-one billion, five hundred forty million, one hundred forty-four thousand, five hundred fifty-five".