51101161 has 8 divisors (see below), whose sum is σ = 52965000. Its totient is φ = 49244160.

The previous prime is 51101159. The next prime is 51101179. The reversal of 51101161 is 16110115.

It can be written as a sum of positive squares in 4 ways, for example, as 8590761 + 42510400 = 2931^2 + 6520^2 .

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 51101161 - 2¹ = 51101159 is a prime.

It is a super-2 number, since 2×51101161² = 5222657311095842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51101131) 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, 17215 + ... + 19963.

It is an arithmetic number, because the mean of its divisors is an integer number (6620625).

Almost surely, 2^51101161 is an apocalyptic number.

It is an amenable number.

51101161 is a deficient number, since it is larger than the sum of its proper divisors (1863839).

51101161 is a wasteful number, since it uses less digits than its factorization.

51101161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419.

The product of its (nonzero) digits is 30, while the sum is 16.

The square root of 51101161 is about 7148.5076064868. The cubic root of 51101161 is about 371.0880100607.

Adding to 51101161 its reverse (16110115), we get a palindrome (67211276).

The spelling of 51101161 in words is "fifty-one million, one hundred one thousand, one hundred sixty-one".