523031340 has 72 divisors (see below), whose sum is σ = 1585837008. Its totient is φ = 128743680.

The previous prime is 523031329. The next prime is 523031347. The reversal of 523031340 is 43130325.

It is not an unprimeable number, because it can be changed into a prime (523031347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15651 + ... + 35930.

It is an arithmetic number, because the mean of its divisors is an integer number (22025514).

Almost surely, 2^523031340 is an apocalyptic number.

It is an amenable number.

523031340 is an abundant number, since it is smaller than the sum of its proper divisors (1062805668).

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

523031340 is a wasteful number, since it uses less digits than its factorization.

523031340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51619 (or 51604 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 523031340 is about 22869.8784430526. The cubic root of 523031340 is about 805.7047131983.

Adding to 523031340 its reverse (43130325), we get a palindrome (566161665).

The spelling of 523031340 in words is "five hundred twenty-three million, thirty-one thousand, three hundred forty".