145500219 has 20 divisors (see below), whose sum is σ = 217712880. Its totient is φ = 96839280.

The previous prime is 145500193. The next prime is 145500227. The reversal of 145500219 is 912005541.

145500219 is a `hidden beast` number, since 145 + 500 + 2 + 19 = 666.

It is not a de Polignac number, because 145500219 - 2⁹ = 145499707 is a prime.

It is a super-2 number, since 2×145500219² = 42340627458095922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 145500192 and 145500201.

It is not an unprimeable number, because it can be changed into a prime (145500919) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 66889 + ... + 69029.

It is an arithmetic number, because the mean of its divisors is an integer number (10885644).

Almost surely, 2^145500219 is an apocalyptic number.

145500219 is a deficient number, since it is larger than the sum of its proper divisors (72212661).

145500219 is an equidigital number, since it uses as much as digits as its factorization.

145500219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 145500219 is about 12062.3471596535. The cubic root of 145500219 is about 525.9622190427.

The spelling of 145500219 in words is "one hundred forty-five million, five hundred thousand, two hundred nineteen".