145531432 has 16 divisors (see below), whose sum is σ = 273700800. Its totient is φ = 72544560.

The previous prime is 145531417. The next prime is 145531433. The reversal of 145531432 is 234135541.

It is a self number, because there is not a number n which added to its sum of digits gives 145531432.

It is not an unprimeable number, because it can be changed into a prime (145531433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24832 + ... + 30127.

It is an arithmetic number, because the mean of its divisors is an integer number (17106300).

Almost surely, 2^145531432 is an apocalyptic number.

It is an amenable number.

145531432 is a deficient number, since it is larger than the sum of its proper divisors (128169368).

145531432 is a wasteful number, since it uses less digits than its factorization.

145531432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55296 (or 55292 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 145531432 is about 12063.6409097751. The cubic root of 145531432 is about 525.9998265118. Note that the first 3 decimals are identical.

Adding to 145531432 its reverse (234135541), we get a palindrome (379666973).

The spelling of 145531432 in words is "one hundred forty-five million, five hundred thirty-one thousand, four hundred thirty-two".