531309140 has 12 divisors (see below), whose sum is σ = 1115749236. Its totient is φ = 212523648.

The previous prime is 531309139. The next prime is 531309151. The reversal of 531309140 is 41903135.

It can be written as a sum of positive squares in 2 ways, for example, as 251349316 + 279959824 = 15854^2 + 16732^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13282709 + ... + 13282748.

It is an arithmetic number, because the mean of its divisors is an integer number (92979103).

Almost surely, 2^531309140 is an apocalyptic number.

It is an amenable number.

531309140 is an abundant number, since it is smaller than the sum of its proper divisors (584440096).

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

531309140 is a wasteful number, since it uses less digits than its factorization.

531309140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26565466 (or 26565464 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 531309140 is about 23050.1440342571. The cubic root of 531309140 is about 809.9330026383.

The spelling of 531309140 in words is "five hundred thirty-one million, three hundred nine thousand, one hundred forty".