144436531 has 4 divisors (see below), whose sum is σ = 144666064. Its totient is φ = 144207000.

The previous prime is 144436519. The next prime is 144436541. The reversal of 144436531 is 135634441.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144436531 is a prime.

It is a super-2 number, since 2×144436531² = 41723822974627922, 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 = 144436493 and 144436502.

It is not an unprimeable number, because it can be changed into a prime (144436511) 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, 113820 + ... + 115081.

It is an arithmetic number, because the mean of its divisors is an integer number (36166516).

Almost surely, 2^144436531 is an apocalyptic number.

144436531 is a deficient number, since it is larger than the sum of its proper divisors (229533).

144436531 is an equidigital number, since it uses as much as digits as its factorization.

144436531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229532.

The product of its digits is 17280, while the sum is 31.

The square root of 144436531 is about 12018.1750278484. The cubic root of 144436531 is about 524.6773903096.

The spelling of 144436531 in words is "one hundred forty-four million, four hundred thirty-six thousand, five hundred thirty-one".