144535531 has 4 divisors (see below), whose sum is σ = 165183472. Its totient is φ = 123887592.

The previous prime is 144535487. The next prime is 144535543. The reversal of 144535531 is 135535441.

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

It is a cyclic number.

It is not a de Polignac number, because 144535531 - 2⁹ = 144535019 is a prime.

It is a super-2 number, since 2×144535531² = 41781039442903922, 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 = 144535493 and 144535502.

It is not an unprimeable number, because it can be changed into a prime (144535571) 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, 10323960 + ... + 10323973.

It is an arithmetic number, because the mean of its divisors is an integer number (41295868).

Almost surely, 2^144535531 is an apocalyptic number.

144535531 is a deficient number, since it is larger than the sum of its proper divisors (20647941).

144535531 is an equidigital number, since it uses as much as digits as its factorization.

144535531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20647940.

The product of its digits is 18000, while the sum is 31.

The square root of 144535531 is about 12022.2930841001. The cubic root of 144535531 is about 524.7972381029.

The spelling of 144535531 in words is "one hundred forty-four million, five hundred thirty-five thousand, five hundred thirty-one".