144981815 has 8 divisors (see below), whose sum is σ = 189794448. Its totient is φ = 105441280.

The previous prime is 144981779. The next prime is 144981833. The reversal of 144981815 is 518189441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144981815 - 2⁶ = 144981751 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 7 ways as a sum of consecutive naturals, for example, 1317962 + ... + 1318071.

It is an arithmetic number, because the mean of its divisors is an integer number (23724306).

Almost surely, 2^144981815 is an apocalyptic number.

144981815 is a deficient number, since it is larger than the sum of its proper divisors (44812633).

144981815 is a wasteful number, since it uses less digits than its factorization.

144981815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636049.

The product of its digits is 46080, while the sum is 41.

The square root of 144981815 is about 12040.8394640905. The cubic root of 144981815 is about 525.3368239183.

The spelling of 144981815 in words is "one hundred forty-four million, nine hundred eighty-one thousand, eight hundred fifteen".