531045039420 has 288 divisors, whose sum is σ = 1880465932800. Its totient is φ = 118794972672.

The previous prime is 531045039409. The next prime is 531045039431. The reversal of 531045039420 is 24930540135.

531045039420 is a `hidden beast` number, since 5 + 3 + 104 + 503 + 9 + 42 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (531045039409) and next prime (531045039431).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16859446 + ... + 16890914.

It is an arithmetic number, because the mean of its divisors is an integer number (6529395600).

Almost surely, 2^531045039420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531045039420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940232966400).

531045039420 is an abundant number, since it is smaller than the sum of its proper divisors (1349420893380).

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

531045039420 is a wasteful number, since it uses less digits than its factorization.

531045039420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31777 (or 31772 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 531045039420 its reverse (24930540135), we get a palindrome (555975579555).

The spelling of 531045039420 in words is "five hundred thirty-one billion, forty-five million, thirty-nine thousand, four hundred twenty".