144721922 has 4 divisors (see below), whose sum is σ = 217082886. Its totient is φ = 72360960.

The previous prime is 144721903. The next prime is 144721931. The reversal of 144721922 is 229127441.

It is a happy number.

144721922 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 133425601 + 11296321 = 11551^2 + 3361^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36180479 + ... + 36180482.

Almost surely, 2^144721922 is an apocalyptic number.

144721922 is a deficient number, since it is larger than the sum of its proper divisors (72360964).

144721922 is an equidigital number, since it uses as much as digits as its factorization.

144721922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72360963.

The product of its digits is 8064, while the sum is 32.

The square root of 144721922 is about 12030.0424770655. The cubic root of 144721922 is about 525.0227315932.

The spelling of 144721922 in words is "one hundred forty-four million, seven hundred twenty-one thousand, nine hundred twenty-two".