1144664531 has 4 divisors (see below), whose sum is σ = 1148123064. Its totient is φ = 1141206000.

The previous prime is 1144664503. The next prime is 1144664567. The reversal of 1144664531 is 1354664411.

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 1144664531 - 2¹⁴ = 1144648147 is a prime.

It is a super-2 number, since 2×1144664531² = 2620513777058899922, 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 = 1144664491 and 1144664500.

It is not an unprimeable number, because it can be changed into a prime (1144664581) 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, 1728770 + ... + 1729431.

It is an arithmetic number, because the mean of its divisors is an integer number (287030766).

Almost surely, 2^1144664531 is an apocalyptic number.

1144664531 is a deficient number, since it is larger than the sum of its proper divisors (3458533).

1144664531 is an equidigital number, since it uses as much as digits as its factorization.

1144664531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458532.

The product of its digits is 34560, while the sum is 35.

The square root of 1144664531 is about 33832.8912598377. The cubic root of 1144664531 is about 1046.0667756763.

The spelling of 1144664531 in words is "one billion, one hundred forty-four million, six hundred sixty-four thousand, five hundred thirty-one".