145044215 has 4 divisors (see below), whose sum is σ = 174053064. Its totient is φ = 116035368.

The previous prime is 145044191. The next prime is 145044223. The reversal of 145044215 is 512440541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512440541 = 163 ⋅3143807.

It is a cyclic number.

It is not a de Polignac number, because 145044215 - 2¹⁰ = 145043191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14504417 + ... + 14504426.

It is an arithmetic number, because the mean of its divisors is an integer number (43513266).

Almost surely, 2^145044215 is an apocalyptic number.

145044215 is a deficient number, since it is larger than the sum of its proper divisors (29008849).

145044215 is an equidigital number, since it uses as much as digits as its factorization.

145044215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29008848.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 145044215 is about 12043.4303668016. The cubic root of 145044215 is about 525.4121812220.

Adding to 145044215 its reverse (512440541), we get a palindrome (657484756).

The spelling of 145044215 in words is "one hundred forty-five million, forty-four thousand, two hundred fifteen".