7051521161 has 8 divisors (see below), whose sum is σ = 7418741064. Its totient is φ = 6693598080.

The previous prime is 7051521107. The next prime is 7051521163. The reversal of 7051521161 is 1611251507.

It can be written as a sum of positive squares in 4 ways, for example, as 1881911161 + 5169610000 = 43381^2 + 71900^2 .

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 7051521161 - 2⁶ = 7051521097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7051521163) 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, 2322650 + ... + 2325683.

It is an arithmetic number, because the mean of its divisors is an integer number (927342633).

Almost surely, 2^7051521161 is an apocalyptic number.

It is an amenable number.

7051521161 is a deficient number, since it is larger than the sum of its proper divisors (367219903).

7051521161 is a wasteful number, since it uses less digits than its factorization.

7051521161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4648411.

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 7051521161 is about 83973.3360120937. The cubic root of 7051521161 is about 1917.6128790625.

Adding to 7051521161 its reverse (1611251507), we get a palindrome (8662772668).

The spelling of 7051521161 in words is "seven billion, fifty-one million, five hundred twenty-one thousand, one hundred sixty-one".