144210731 has 4 divisors (see below), whose sum is σ = 164812272. Its totient is φ = 123609192.

The previous prime is 144210709. The next prime is 144210743. The reversal of 144210731 is 137012441.

It is a happy number.

144210731 is digitally balanced in base 2, 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 is a de Polignac number, because none of the positive numbers 2^k-144210731 is a prime.

It is a super-2 number, since 2×144210731² = 41593469871108722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144210697 and 144210706.

It is not an unprimeable number, because it can be changed into a prime (144210701) 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, 10300760 + ... + 10300773.

It is an arithmetic number, because the mean of its divisors is an integer number (41203068).

Almost surely, 2^144210731 is an apocalyptic number.

144210731 is a deficient number, since it is larger than the sum of its proper divisors (20601541).

144210731 is an equidigital number, since it uses as much as digits as its factorization.

144210731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20601540.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 144210731 is about 12008.7772483297. Note that the first 3 decimals coincide. The cubic root of 144210731 is about 524.4038354500.

The spelling of 144210731 in words is "one hundred forty-four million, two hundred ten thousand, seven hundred thirty-one".