531214840 has 64 divisors (see below), whose sum is σ = 1308353760. Its totient is φ = 192913920.

The previous prime is 531214807. The next prime is 531214841. The reversal of 531214840 is 48412135.

It is a junction number, because it is equal to n+sod(n) for n = 531214799 and 531214808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531214841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23347 + ... + 40093.

Almost surely, 2^531214840 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 531214840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654176880).

531214840 is an abundant number, since it is smaller than the sum of its proper divisors (777138920).

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

531214840 is a wasteful number, since it uses less digits than its factorization.

531214840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16832 (or 16828 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 531214840 is about 23048.0984031221. The cubic root of 531214840 is about 809.8850825133.

Adding to 531214840 its reverse (48412135), we get a palindrome (579626975).

The spelling of 531214840 in words is "five hundred thirty-one million, two hundred fourteen thousand, eight hundred forty".