1131335551 has 8 divisors (see below), whose sum is σ = 1136807424. Its totient is φ = 1125877080.

The previous prime is 1131335507. The next prime is 1131335573. The reversal of 1131335551 is 1555331311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131335551 - 2⁷ = 1131335423 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 (1131335581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192466 + ... + 198256.

It is an arithmetic number, because the mean of its divisors is an integer number (142100928).

Almost surely, 2^1131335551 is an apocalyptic number.

1131335551 is a deficient number, since it is larger than the sum of its proper divisors (5471873).

1131335551 is an equidigital number, since it uses as much as digits as its factorization.

1131335551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701.

The product of its digits is 3375, while the sum is 28.

The square root of 1131335551 is about 33635.3318847904. The cubic root of 1131335551 is about 1041.9906249502.

Adding to 1131335551 its reverse (1555331311), we get a palindrome (2686666862).

It can be divided in two parts, 11313 and 35551, that added together give a palindrome (46864).

The spelling of 1131335551 in words is "one billion, one hundred thirty-one million, three hundred thirty-five thousand, five hundred fifty-one".