144693531 has 12 divisors (see below), whose sum is σ = 220002120. Its totient is φ = 91385280.

The previous prime is 144693503. The next prime is 144693539. The reversal of 144693531 is 135396441.

It is not a de Polignac number, because 144693531 - 2¹⁰ = 144692507 is a prime.

It is a super-2 number, since 2×144693531² = 41872435826495922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144693539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422910 + ... + 423251.

It is an arithmetic number, because the mean of its divisors is an integer number (18333510).

Almost surely, 2^144693531 is an apocalyptic number.

144693531 is a deficient number, since it is larger than the sum of its proper divisors (75308589).

144693531 is a wasteful number, since it uses less digits than its factorization.

144693531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846186 (or 846183 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 144693531 is about 12028.8624150416. The cubic root of 144693531 is about 524.9883970225.

The spelling of 144693531 in words is "one hundred forty-four million, six hundred ninety-three thousand, five hundred thirty-one".