1161151051 has 4 divisors (see below), whose sum is σ = 1229454072. Its totient is φ = 1092848032.

The previous prime is 1161151031. The next prime is 1161151091. The reversal of 1161151051 is 1501511611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1501511611 = 743 ⋅2020877.

It is a cyclic number.

It is not a de Polignac number, because 1161151051 - 2²¹ = 1159053899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161151001) 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, 34151485 + ... + 34151518.

It is an arithmetic number, because the mean of its divisors is an integer number (307363518).

Almost surely, 2^1161151051 is an apocalyptic number.

1161151051 is a deficient number, since it is larger than the sum of its proper divisors (68303021).

1161151051 is an equidigital number, since it uses as much as digits as its factorization.

1161151051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68303020.

The product of its (nonzero) digits is 150, while the sum is 22.

The square root of 1161151051 is about 34075.6665525416. Note that the first 3 decimals coincide. The cubic root of 1161151051 is about 1051.0649968268.

Adding to 1161151051 its reverse (1501511611), we get a palindrome (2662662662).

The spelling of 1161151051 in words is "one billion, one hundred sixty-one million, one hundred fifty-one thousand, fifty-one".