1005115231 has 4 divisors (see below), whose sum is σ = 1006655112. Its totient is φ = 1003575352.

The previous prime is 1005115229. The next prime is 1005115271. The reversal of 1005115231 is 1325115001.

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 1005115231 - 2¹ = 1005115229 is a prime.

It is a super-2 number, since 2×1005115231² = 2020513255176366722, 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 = 1005115199 and 1005115208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005115271) 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, 768961 + ... + 770266.

It is an arithmetic number, because the mean of its divisors is an integer number (251663778).

Almost surely, 2^1005115231 is an apocalyptic number.

1005115231 is a deficient number, since it is larger than the sum of its proper divisors (1539881).

1005115231 is an equidigital number, since it uses as much as digits as its factorization.

1005115231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539880.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1005115231 is about 31703.5523403924. The cubic root of 1005115231 is about 1001.7021779463.

The spelling of 1005115231 in words is "one billion, five million, one hundred fifteen thousand, two hundred thirty-one".