1115152231 has 4 divisors (see below), whose sum is σ = 1115905672. Its totient is φ = 1114398792.

The previous prime is 1115152219. The next prime is 1115152249. The reversal of 1115152231 is 1322515111.

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 1115152231 - 2¹³ = 1115144039 is a prime.

It is a super-2 number, since 2×1115152231² = 2487128996608554722, 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 (1115152201) 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, 374496 + ... + 377461.

It is an arithmetic number, because the mean of its divisors is an integer number (278976418).

Almost surely, 2^1115152231 is an apocalyptic number.

1115152231 is a deficient number, since it is larger than the sum of its proper divisors (753441).

1115152231 is an equidigital number, since it uses as much as digits as its factorization.

1115152231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753440.

The product of its digits is 300, while the sum is 22.

The square root of 1115152231 is about 33393.8951157244. The cubic root of 1115152231 is about 1036.9983193339.

Adding to 1115152231 its reverse (1322515111), we get a palindrome (2437667342).

The spelling of 1115152231 in words is "one billion, one hundred fifteen million, one hundred fifty-two thousand, two hundred thirty-one".