144224546 has 4 divisors (see below), whose sum is σ = 216336822. Its totient is φ = 72112272.

The previous prime is 144224543. The next prime is 144224579. The reversal of 144224546 is 645422441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645422441 = 3739 ⋅172619.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 25654225 = 10889^2 + 5065^2 .

It is a super-2 number, since 2×144224546² = 41601439337812232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144224543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36056135 + ... + 36056138.

Almost surely, 2^144224546 is an apocalyptic number.

144224546 is a deficient number, since it is larger than the sum of its proper divisors (72112276).

144224546 is an equidigital number, since it uses as much as digits as its factorization.

144224546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72112275.

The product of its digits is 30720, while the sum is 32.

The square root of 144224546 is about 12009.3524388287. The cubic root of 144224546 is about 524.4205804074.

Adding to 144224546 its reverse (645422441), we get a palindrome (789646987).

The spelling of 144224546 in words is "one hundred forty-four million, two hundred twenty-four thousand, five hundred forty-six".