531216554 has 48 divisors (see below), whose sum is σ = 924677856. Its totient is φ = 226951200.

The previous prime is 531216463. The next prime is 531216557. The reversal of 531216554 is 455612135.

It is a self number, because there is not a number n which added to its sum of digits gives 531216554.

It is not an unprimeable number, because it can be changed into a prime (531216557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1675604 + ... + 1675920.

It is an arithmetic number, because the mean of its divisors is an integer number (19264122).

Almost surely, 2^531216554 is an apocalyptic number.

531216554 is a deficient number, since it is larger than the sum of its proper divisors (393461302).

531216554 is a wasteful number, since it uses less digits than its factorization.

531216554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 560 counting only the distinct ones).

The product of its digits is 18000, while the sum is 32.

The square root of 531216554 is about 23048.1355862031. The cubic root of 531216554 is about 809.8859535617.

Adding to 531216554 its reverse (455612135), we get a palindrome (986828689).

The spelling of 531216554 in words is "five hundred thirty-one million, two hundred sixteen thousand, five hundred fifty-four".