51621112 has 32 divisors (see below), whose sum is σ = 103420800. Its totient is φ = 24070144.

The previous prime is 51621079. The next prime is 51621121. The reversal of 51621112 is 21112615.

It is a self number, because there is not a number n which added to its sum of digits gives 51621112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13689 + ... + 17047.

It is an arithmetic number, because the mean of its divisors is an integer number (3231900).

Almost surely, 2^51621112 is an apocalyptic number.

It is an amenable number.

51621112 is an abundant number, since it is smaller than the sum of its proper divisors (51799688).

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

51621112 is a wasteful number, since it uses less digits than its factorization.

51621112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495 (or 3491 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 51621112 is about 7184.7833648622. The cubic root of 51621112 is about 372.3423641219.

Adding to 51621112 its reverse (21112615), we get a palindrome (72733727).

The spelling of 51621112 in words is "fifty-one million, six hundred twenty-one thousand, one hundred twelve".