1530733231 has 4 divisors (see below), whose sum is σ = 1530858600. Its totient is φ = 1530607864.

The previous prime is 1530733223. The next prime is 1530733247. The reversal of 1530733231 is 1323370351.

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 1530733231 - 2³ = 1530733223 is a prime.

It is a super-2 number, since 2×1530733231² = 4686288448975398722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1530733231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530733291) 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, 42121 + ... + 69538.

It is an arithmetic number, because the mean of its divisors is an integer number (382714650).

Almost surely, 2^1530733231 is an apocalyptic number.

1530733231 is a deficient number, since it is larger than the sum of its proper divisors (125369).

1530733231 is a wasteful number, since it uses less digits than its factorization.

1530733231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125368.

The product of its (nonzero) digits is 5670, while the sum is 28.

The square root of 1530733231 is about 39124.5860169791. The cubic root of 1530733231 is about 1152.4793968991.

The spelling of 1530733231 in words is "one billion, five hundred thirty million, seven hundred thirty-three thousand, two hundred thirty-one".