145513300221 has 12 divisors (see below), whose sum is σ = 219324394848. Its totient is φ = 92791089864.

The previous prime is 145513300217. The next prime is 145513300243. The reversal of 145513300221 is 122003315541.

145513300221 is a `hidden beast` number, since 145 + 513 + 3 + 0 + 0 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 145513300221 - 2² = 145513300217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145513300201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 351481195 + ... + 351481608.

It is an arithmetic number, because the mean of its divisors is an integer number (18277032904).

Almost surely, 2^145513300221 is an apocalyptic number.

It is an amenable number.

145513300221 is a deficient number, since it is larger than the sum of its proper divisors (73811094627).

145513300221 is a wasteful number, since it uses less digits than its factorization.

145513300221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702962832 (or 702962829 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 145513300221 its reverse (122003315541), we get a palindrome (267516615762).

The spelling of 145513300221 in words is "one hundred forty-five billion, five hundred thirteen million, three hundred thousand, two hundred twenty-one".