1115400253 has 4 divisors (see below), whose sum is σ = 1216800288. Its totient is φ = 1014000220.

The previous prime is 1115400197. The next prime is 1115400257. The reversal of 1115400253 is 3520045111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115400253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115400257) 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, 50700001 + ... + 50700022.

It is an arithmetic number, because the mean of its divisors is an integer number (304200072).

Almost surely, 2^1115400253 is an apocalyptic number.

It is an amenable number.

1115400253 is a deficient number, since it is larger than the sum of its proper divisors (101400035).

1115400253 is a wasteful number, since it uses less digits than its factorization.

1115400253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101400034.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1115400253 is about 33397.6084922259. The cubic root of 1115400253 is about 1037.0751935412.

Adding to 1115400253 its reverse (3520045111), we get a palindrome (4635445364).

The spelling of 1115400253 in words is "one billion, one hundred fifteen million, four hundred thousand, two hundred fifty-three".