51116620 has 24 divisors (see below), whose sum is σ = 113660064. Its totient is φ = 19243776.

The previous prime is 51116617. The next prime is 51116621. The reversal of 51116620 is 2661115.

It is a super-2 number, since 2×51116620² = 5225817680448800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51116591 and 51116600.

It is not an unprimeable number, because it can be changed into a prime (51116621) 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, 74832 + ... + 75511.

It is an arithmetic number, because the mean of its divisors is an integer number (4735836).

Almost surely, 2^51116620 is an apocalyptic number.

It is an amenable number.

51116620 is an abundant number, since it is smaller than the sum of its proper divisors (62543444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51116620 is a wasteful number, since it uses less digits than its factorization.

51116620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150369 (or 150367 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51116620 is about 7149.5887993646. The cubic root of 51116620 is about 371.1254265045.

Adding to 51116620 its reverse (2661115), we get a palindrome (53777735).

The spelling of 51116620 in words is "fifty-one million, one hundred sixteen thousand, six hundred twenty".