1135451551 has 4 divisors (see below), whose sum is σ = 1222793992. Its totient is φ = 1048109112.

The previous prime is 1135451509. The next prime is 1135451561. The reversal of 1135451551 is 1551545311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1551545311 = 83 ⋅18693317.

It is a cyclic number.

It is not a de Polignac number, because 1135451551 - 2⁷ = 1135451423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135451561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43671201 + ... + 43671226.

It is an arithmetic number, because the mean of its divisors is an integer number (305698498).

Almost surely, 2^1135451551 is an apocalyptic number.

1135451551 is a deficient number, since it is larger than the sum of its proper divisors (87342441).

1135451551 is an equidigital number, since it uses as much as digits as its factorization.

1135451551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87342440.

The product of its digits is 7500, while the sum is 31.

The square root of 1135451551 is about 33696.4619952897. The cubic root of 1135451551 is about 1043.2527446682.

Adding to 1135451551 its reverse (1551545311), we get a palindrome (2686996862).

The spelling of 1135451551 in words is "one billion, one hundred thirty-five million, four hundred fifty-one thousand, five hundred fifty-one".