531555045 has 16 divisors (see below), whose sum is σ = 971986560. Its totient is φ = 242996544.

The previous prime is 531555041. The next prime is 531555091. The reversal of 531555045 is 540555135.

It is not a de Polignac number, because 531555045 - 2² = 531555041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 531554997 and 531555015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531555041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2531110 + ... + 2531319.

It is an arithmetic number, because the mean of its divisors is an integer number (60749160).

Almost surely, 2^531555045 is an apocalyptic number.

It is an amenable number.

531555045 is a deficient number, since it is larger than the sum of its proper divisors (440431515).

531555045 is a wasteful number, since it uses less digits than its factorization.

531555045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062444.

The product of its (nonzero) digits is 37500, while the sum is 33.

The square root of 531555045 is about 23055.4775487301. The cubic root of 531555045 is about 810.0579367185.

The spelling of 531555045 in words is "five hundred thirty-one million, five hundred fifty-five thousand, forty-five".