1530231 has 4 divisors (see below), whose sum is σ = 2040312. Its totient is φ = 1020152.

The previous prime is 1530229. The next prime is 1530233. The reversal of 1530231 is 1320351.

It is a happy number.

1530231 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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

It is an interprime number because it is at equal distance from previous prime (1530229) and next prime (1530233).

It is a cyclic number.

It is not a de Polignac number, because 1530231 - 2¹ = 1530229 is a prime.

It is a super-2 number, since 2×1530231² = 4683213826722, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1530231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530233) 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, 255036 + ... + 255041.

It is an arithmetic number, because the mean of its divisors is an integer number (510078).

2^1530231 is an apocalyptic number.

1530231 is a deficient number, since it is larger than the sum of its proper divisors (510081).

1530231 is an equidigital number, since it uses as much as digits as its factorization.

1530231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510080.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1530231 is about 1237.0250603767. The cubic root of 1530231 is about 115.2353340928.

Adding to 1530231 its reverse (1320351), we get a palindrome (2850582).

The spelling of 1530231 in words is "one million, five hundred thirty thousand, two hundred thirty-one".