145331232 has 48 divisors (see below), whose sum is σ = 403939872. Its totient is φ = 45593600.

The previous prime is 145331213. The next prime is 145331239. The reversal of 145331232 is 232133541.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×145331232² = 42242333989275648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (145331239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42894 + ... + 46157.

It is an arithmetic number, because the mean of its divisors is an integer number (8415414).

Almost surely, 2^145331232 is an apocalyptic number.

145331232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

145331232 is an abundant number, since it is smaller than the sum of its proper divisors (258608640).

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

145331232 is a wasteful number, since it uses less digits than its factorization.

145331232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89081 (or 89073 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 145331232 is about 12055.3403933692. The cubic root of 145331232 is about 525.7585189850.

Adding to 145331232 its reverse (232133541), we get a palindrome (377464773).

The spelling of 145331232 in words is "one hundred forty-five million, three hundred thirty-one thousand, two hundred thirty-two".