144523381 has 2 divisors, whose sum is σ = 144523382. Its totient is φ = 144523380.

The previous prime is 144523363. The next prime is 144523439. The reversal of 144523381 is 183325441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82192356 + 62331025 = 9066^2 + 7895^2 .

It is a cyclic number.

It is not a de Polignac number, because 144523381 - 2⁵ = 144523349 is a prime.

It is a super-2 number, since 2×144523381² = 41774015311342322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144523321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72261690 + 72261691.

It is an arithmetic number, because the mean of its divisors is an integer number (72261691).

Almost surely, 2^144523381 is an apocalyptic number.

It is an amenable number.

144523381 is a deficient number, since it is larger than the sum of its proper divisors (1).

144523381 is an equidigital number, since it uses as much as digits as its factorization.

144523381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 144523381 is about 12021.7877622257. The cubic root of 144523381 is about 524.7825324568.

The spelling of 144523381 in words is "one hundred forty-four million, five hundred twenty-three thousand, three hundred eighty-one".