531142550 has 24 divisors (see below), whose sum is σ = 988585536. Its totient is φ = 212315040.

The previous prime is 531142523. The next prime is 531142559. The reversal of 531142550 is 55241135.

It is a super-2 number, since 2×531142550² = 564224816841005000, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531142559) 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 11 ways as a sum of consecutive naturals, for example, 104672 + ... + 109628.

It is an arithmetic number, because the mean of its divisors is an integer number (41191064).

Almost surely, 2^531142550 is an apocalyptic number.

531142550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

531142550 is a deficient number, since it is larger than the sum of its proper divisors (457442986).

531142550 is a wasteful number, since it uses less digits than its factorization.

531142550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112 (or 7107 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 531142550 is about 23046.5301075889. The cubic root of 531142550 is about 809.8483432983.

Adding to 531142550 its reverse (55241135), we get a palindrome (586383685).

The spelling of 531142550 in words is "five hundred thirty-one million, one hundred forty-two thousand, five hundred fifty".