531535830 has 96 divisors (see below), whose sum is σ = 1562146560. Its totient is φ = 115093440.

The previous prime is 531535801. The next prime is 531535843. The reversal of 531535830 is 38535135.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 531535791 and 531535800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18415 + ... + 37445.

It is an arithmetic number, because the mean of its divisors is an integer number (16272360).

Almost surely, 2^531535830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531535830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (781073280).

531535830 is an abundant number, since it is smaller than the sum of its proper divisors (1030610730).

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

531535830 is a wasteful number, since it uses less digits than its factorization.

531535830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19074 (or 19067 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 531535830 is about 23055.0608327109. The cubic root of 531535830 is about 810.0481757659.

The spelling of 531535830 in words is "five hundred thirty-one million, five hundred thirty-five thousand, eight hundred thirty".