531051540 has 24 divisors (see below), whose sum is σ = 1486944480. Its totient is φ = 141613728.

The previous prime is 531051517. The next prime is 531051583. The reversal of 531051540 is 45150135.

It is a self number, because there is not a number n which added to its sum of digits gives 531051540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4425370 + ... + 4425489.

It is an arithmetic number, because the mean of its divisors is an integer number (61956020).

Almost surely, 2^531051540 is an apocalyptic number.

It is an amenable number.

531051540 is an abundant number, since it is smaller than the sum of its proper divisors (955892940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531051540 is a wasteful number, since it uses less digits than its factorization.

531051540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8850871 (or 8850869 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 531051540 is about 23044.5555392158. Note that the first 4 decimals coincide. The cubic root of 531051540 is about 809.8020854668.

It can be divided in two parts, 53105 and 1540, that added together give a palindrome (54645).

The spelling of 531051540 in words is "five hundred thirty-one million, fifty-one thousand, five hundred forty".