53815161 has 4 divisors (see below), whose sum is σ = 71753552. Its totient is φ = 35876772.

The previous prime is 53815159. The next prime is 53815187. The reversal of 53815161 is 16151835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 53815161 - 2¹ = 53815159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53815061) 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, 8969191 + ... + 8969196.

It is an arithmetic number, because the mean of its divisors is an integer number (17938388).

Almost surely, 2^53815161 is an apocalyptic number.

It is an amenable number.

53815161 is a deficient number, since it is larger than the sum of its proper divisors (17938391).

53815161 is a wasteful number, since it uses less digits than its factorization.

53815161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17938390.

The product of its digits is 3600, while the sum is 30.

The square root of 53815161 is about 7335.8817465932. The cubic root of 53815161 is about 377.5445579906.

Adding to 53815161 its reverse (16151835), we get a palindrome (69966996).

The spelling of 53815161 in words is "fifty-three million, eight hundred fifteen thousand, one hundred sixty-one".