1011323531 has 8 divisors (see below), whose sum is σ = 1027176240. Its totient is φ = 995524992.

The previous prime is 1011323513. The next prime is 1011323549. The reversal of 1011323531 is 1353231101.

1011323531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1011323513) and next prime (1011323549).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011323531 is a prime.

It is a super-2 number, since 2×1011323531² = 2045550568708615922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011323561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24935 + ... + 51423.

It is an arithmetic number, because the mean of its divisors is an integer number (128397030).

Almost surely, 2^1011323531 is an apocalyptic number.

1011323531 is a deficient number, since it is larger than the sum of its proper divisors (15852709).

1011323531 is an equidigital number, since it uses as much as digits as its factorization.

1011323531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27085.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1011323531 is about 31801.3133533821. The cubic root of 1011323531 is about 1003.7603523594.

Adding to 1011323531 its reverse (1353231101), we get a palindrome (2364554632).

The spelling of 1011323531 in words is "one billion, eleven million, three hundred twenty-three thousand, five hundred thirty-one".