531535140 has 72 divisors (see below), whose sum is σ = 1619145528. Its totient is φ = 141143040.

The previous prime is 531535133. The next prime is 531535153. The reversal of 531535140 is 41535135.

It can be written as a sum of positive squares in 4 ways, for example, as 99560484 + 431974656 = 9978^2 + 20784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37254 + ... + 49506.

Almost surely, 2^531535140 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 531535140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (809572764).

531535140 is an abundant number, since it is smaller than the sum of its proper divisors (1087610388).

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

531535140 is a wasteful number, since it uses less digits than its factorization.

531535140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12509 (or 12504 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 531535140 is about 23055.0458685295. The cubic root of 531535140 is about 810.0478252512.

The spelling of 531535140 in words is "five hundred thirty-one million, five hundred thirty-five thousand, one hundred forty".