144213139 has 4 divisors (see below), whose sum is σ = 164815024. Its totient is φ = 123611256.

The previous prime is 144213137. The next prime is 144213191. The reversal of 144213139 is 931312441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931312441 = 6763 ⋅137707.

It is a cyclic number.

It is not a de Polignac number, because 144213139 - 2¹ = 144213137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144213131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10300932 + ... + 10300945.

It is an arithmetic number, because the mean of its divisors is an integer number (41203756).

Almost surely, 2^144213139 is an apocalyptic number.

144213139 is a deficient number, since it is larger than the sum of its proper divisors (20601885).

144213139 is an equidigital number, since it uses as much as digits as its factorization.

144213139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20601884.

The product of its digits is 2592, while the sum is 28.

The square root of 144213139 is about 12008.8775079106. The cubic root of 144213139 is about 524.4067542282.

The spelling of 144213139 in words is "one hundred forty-four million, two hundred thirteen thousand, one hundred thirty-nine".