1011530231 has 4 divisors (see below), whose sum is σ = 1011599112. Its totient is φ = 1011461352.

The previous prime is 1011530207. The next prime is 1011530249. The reversal of 1011530231 is 1320351101.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1320351101 = 31 ⋅42591971.

It is a cyclic number.

It is not a de Polignac number, because 1011530231 - 2¹⁴ = 1011513847 is a prime.

It is a super-2 number, since 2×1011530231² = 2046386816453826722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011530131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600 + ... + 45053.

It is an arithmetic number, because the mean of its divisors is an integer number (252899778).

Almost surely, 2^1011530231 is an apocalyptic number.

1011530231 is a deficient number, since it is larger than the sum of its proper divisors (68881).

1011530231 is an equidigital number, since it uses as much as digits as its factorization.

1011530231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68880.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1011530231 is about 31804.5630531218. The cubic root of 1011530231 is about 1003.8287324326.

Adding to 1011530231 its reverse (1320351101), we get a palindrome (2331881332).

The spelling of 1011530231 in words is "one billion, eleven million, five hundred thirty thousand, two hundred thirty-one".