1118620051 has 4 divisors (see below), whose sum is σ = 1129074552. Its totient is φ = 1108165552.

The previous prime is 1118620031. The next prime is 1118620081. The reversal of 1118620051 is 1500268111.

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: 1500268111 = 27197 ⋅55163.

It is a cyclic number.

It is not a de Polignac number, because 1118620051 - 2¹³ = 1118611859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1118619998 and 1118620025.

It is not an unprimeable number, because it can be changed into a prime (1118620031) 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, 5227090 + ... + 5227303.

It is an arithmetic number, because the mean of its divisors is an integer number (282268638).

Almost surely, 2^1118620051 is an apocalyptic number.

1118620051 is a deficient number, since it is larger than the sum of its proper divisors (10454501).

1118620051 is a wasteful number, since it uses less digits than its factorization.

1118620051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10454500.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1118620051 is about 33445.7777753785. Note that the first 5 decimals coincide. The cubic root of 1118620051 is about 1038.0721345444.

Adding to 1118620051 its reverse (1500268111), we get a palindrome (2618888162).

The spelling of 1118620051 in words is "one billion, one hundred eighteen million, six hundred twenty thousand, fifty-one".