145223536 has 40 divisors (see below), whose sum is σ = 297044480. Its totient is φ = 68589504.

The previous prime is 145223531. The next prime is 145223563. The reversal of 145223536 is 635322541.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 145223498 and 145223507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145223531) 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, 184135 + ... + 184921.

It is an arithmetic number, because the mean of its divisors is an integer number (7426112).

Almost surely, 2^145223536 is an apocalyptic number.

145223536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145223536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148522240).

145223536 is an abundant number, since it is smaller than the sum of its proper divisors (151820944).

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

145223536 is a wasteful number, since it uses less digits than its factorization.

145223536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1415 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 145223536 is about 12050.8728314591. The cubic root of 145223536 is about 525.6286178370.

The spelling of 145223536 in words is "one hundred forty-five million, two hundred twenty-three thousand, five hundred thirty-six".