1135230251 has 4 divisors (see below), whose sum is σ = 1184588112. Its totient is φ = 1085872392.

The previous prime is 1135230223. The next prime is 1135230253. The reversal of 1135230251 is 1520325311.

It is a happy number.

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 1135230251 - 2²² = 1131035947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 49357837 = 1135230251 / (1 + 1 + 3 + 5 + 2 + 3 + 0 + 2 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135230253) 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, 24678896 + ... + 24678941.

It is an arithmetic number, because the mean of its divisors is an integer number (296147028).

Almost surely, 2^1135230251 is an apocalyptic number.

1135230251 is a deficient number, since it is larger than the sum of its proper divisors (49357861).

1135230251 is an equidigital number, since it uses as much as digits as its factorization.

1135230251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49357860.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1135230251 is about 33693.1781077416. The cubic root of 1135230251 is about 1043.1849634603.

Adding to 1135230251 its reverse (1520325311), we get a palindrome (2655555562).

The spelling of 1135230251 in words is "one billion, one hundred thirty-five million, two hundred thirty thousand, two hundred fifty-one".