53115611 has 4 divisors (see below), whose sum is σ = 53136552. Its totient is φ = 53094672.

The previous prime is 53115607. The next prime is 53115619. The reversal of 53115611 is 11651135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11651135 = 5 ⋅2330227.

It is a cyclic number.

It is not a de Polignac number, because 53115611 - 2² = 53115607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53115619) 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, 6041 + ... + 11946.

It is an arithmetic number, because the mean of its divisors is an integer number (13284138).

Almost surely, 2^53115611 is an apocalyptic number.

53115611 is a deficient number, since it is larger than the sum of its proper divisors (20941).

53115611 is a wasteful number, since it uses less digits than its factorization.

53115611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20940.

The product of its digits is 450, while the sum is 23.

The square root of 53115611 is about 7288.0457600100. The cubic root of 53115611 is about 375.9015015683.

Adding to 53115611 its reverse (11651135), we get a palindrome (64766746).

The spelling of 53115611 in words is "fifty-three million, one hundred fifteen thousand, six hundred eleven".