145206221519 has 4 divisors (see below), whose sum is σ = 148747836720. Its totient is φ = 141664606320.

The previous prime is 145206221507. The next prime is 145206221527. The reversal of 145206221519 is 915122602541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145206221519 - 2²⁰ = 145205172943 is a prime.

It is a super-2 number, since 2×145206221519² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145206221819) 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 3 ways as a sum of consecutive naturals, for example, 1770807539 + ... + 1770807620.

It is an arithmetic number, because the mean of its divisors is an integer number (37186959180).

Almost surely, 2^145206221519 is an apocalyptic number.

145206221519 is a deficient number, since it is larger than the sum of its proper divisors (3541615201).

145206221519 is an equidigital number, since it uses as much as digits as its factorization.

145206221519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541615200.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 145206221519 in words is "one hundred forty-five billion, two hundred six million, two hundred twenty-one thousand, five hundred nineteen".