531400523020 has 192 divisors, whose sum is σ = 1203852948480. Its totient is φ = 196451868672.

The previous prime is 531400523011. The next prime is 531400523023. The reversal of 531400523020 is 20325004135.

It is not an unprimeable number, because it can be changed into a prime (531400523023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1227252724 + ... + 1227253156.

It is an arithmetic number, because the mean of its divisors is an integer number (6270067440).

Almost surely, 2^531400523020 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 531400523020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601926474240).

531400523020 is an abundant number, since it is smaller than the sum of its proper divisors (672452425460).

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

531400523020 is a wasteful number, since it uses less digits than its factorization.

531400523020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 531400523020 its reverse (20325004135), we get a palindrome (551725527155).

The spelling of 531400523020 in words is "five hundred thirty-one billion, four hundred million, five hundred twenty-three thousand, twenty".