51616118 has 4 divisors (see below), whose sum is σ = 77424180. Its totient is φ = 25808058.

The previous prime is 51616093. The next prime is 51616139. The reversal of 51616118 is 81161615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81161615 = 5 ⋅16232323.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12904028 + ... + 12904031.

It is an arithmetic number, because the mean of its divisors is an integer number (19356045).

Almost surely, 2^51616118 is an apocalyptic number.

51616118 is a deficient number, since it is larger than the sum of its proper divisors (25808062).

51616118 is a wasteful number, since it uses less digits than its factorization.

51616118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25808061.

The product of its digits is 1440, while the sum is 29.

The square root of 51616118 is about 7184.4358164020. The cubic root of 51616118 is about 372.3303565172.

The spelling of 51616118 in words is "fifty-one million, six hundred sixteen thousand, one hundred eighteen".