531632730 has 64 divisors (see below), whose sum is σ = 1347840000. Its totient is φ = 133830720.

The previous prime is 531632729. The next prime is 531632753. The reversal of 531632730 is 37236135.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175771 + ... + 178769.

It is an arithmetic number, because the mean of its divisors is an integer number (21060000).

Almost surely, 2^531632730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531632730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (673920000).

531632730 is an abundant number, since it is smaller than the sum of its proper divisors (816207270).

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

531632730 is a wasteful number, since it uses less digits than its factorization.

531632730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339.

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 531632730 is about 23057.1622278198. The cubic root of 531632730 is about 810.0973972197.

Adding to 531632730 its reverse (37236135), we get a palindrome (568868865).

The spelling of 531632730 in words is "five hundred thirty-one million, six hundred thirty-two thousand, seven hundred thirty".