1113420551 has 4 divisors (see below), whose sum is σ = 1113768600. Its totient is φ = 1113072504.

The previous prime is 1113420541. The next prime is 1113420619. The reversal of 1113420551 is 1550243111.

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 1113420551 - 2⁶ = 1113420487 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 (1113420541) 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, 169181 + ... + 175638.

It is an arithmetic number, because the mean of its divisors is an integer number (278442150).

Almost surely, 2^1113420551 is an apocalyptic number.

1113420551 is a deficient number, since it is larger than the sum of its proper divisors (348049).

1113420551 is an equidigital number, since it uses as much as digits as its factorization.

1113420551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348048.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1113420551 is about 33367.9569497445. The cubic root of 1113420551 is about 1036.4612687200.

Adding to 1113420551 its reverse (1550243111), we get a palindrome (2663663662).

The spelling of 1113420551 in words is "one billion, one hundred thirteen million, four hundred twenty thousand, five hundred fifty-one".