531578442 has 16 divisors (see below), whose sum is σ = 1072566720. Its totient is φ = 175624512.

The previous prime is 531578441. The next prime is 531578477. The reversal of 531578442 is 244875135.

It is a super-3 number, since 3×531578442³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531578442.

It is not an unprimeable number, because it can be changed into a prime (531578441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391342 + ... + 392697.

It is an arithmetic number, because the mean of its divisors is an integer number (67035420).

Almost surely, 2^531578442 is an apocalyptic number.

531578442 is an abundant number, since it is smaller than the sum of its proper divisors (540988278).

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

531578442 is a wasteful number, since it uses less digits than its factorization.

531578442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784157.

The product of its digits is 134400, while the sum is 39.

The square root of 531578442 is about 23055.9849496828. The cubic root of 531578442 is about 810.0698217514.

The spelling of 531578442 in words is "five hundred thirty-one million, five hundred seventy-eight thousand, four hundred forty-two".