145221400505219 has 2 divisors, whose sum is σ = 145221400505220. Its totient is φ = 145221400505218.

The previous prime is 145221400505179. The next prime is 145221400505261. The reversal of 145221400505219 is 912505004122541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145221400505219 - 2²⁸ = 145221132069763 is a prime.

It is a super-2 number, since 2×145221400505219² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145221400502219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610700252609 + 72610700252610.

It is an arithmetic number, because the mean of its divisors is an integer number (72610700252610).

Almost surely, 2^{145221400505219} is an apocalyptic number.

145221400505219 is a deficient number, since it is larger than the sum of its proper divisors (1).

145221400505219 is an equidigital number, since it uses as much as digits as its factorization.

145221400505219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 145221400505219 in words is "one hundred forty-five trillion, two hundred twenty-one billion, four hundred million, five hundred five thousand, two hundred nineteen".