145441222520 has 64 divisors (see below), whose sum is σ = 358486041600. Its totient is φ = 52666391680.

The previous prime is 145441222513. The next prime is 145441222529. The reversal of 145441222520 is 25222144541.

It is a super-2 number, since 2×145441222520² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145441222529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586364 + ... + 796683.

It is an arithmetic number, because the mean of its divisors is an integer number (5601344400).

Almost surely, 2^145441222520 is an apocalyptic number.

145441222520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145441222520 is an abundant number, since it is smaller than the sum of its proper divisors (213044819080).

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

145441222520 is a wasteful number, since it uses less digits than its factorization.

145441222520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383308 (or 1383304 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

The spelling of 145441222520 in words is "one hundred forty-five billion, four hundred forty-one million, two hundred twenty-two thousand, five hundred twenty".