51109552 has 20 divisors (see below), whose sum is σ = 106642480. Its totient is φ = 23588928.

The previous prime is 51109549. The next prime is 51109559. The reversal of 51109552 is 25590115.

It is a super-2 number, since 2×51109552² = 5224372611281408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51109552.

It is not an unprimeable number, because it can be changed into a prime (51109559) 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, 122652 + ... + 123067.

It is an arithmetic number, because the mean of its divisors is an integer number (5332124).

Almost surely, 2^51109552 is an apocalyptic number.

51109552 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51109552 is an abundant number, since it is smaller than the sum of its proper divisors (55532928).

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

51109552 is a wasteful number, since it uses less digits than its factorization.

51109552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245740 (or 245734 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 51109552 is about 7149.0944881153. The cubic root of 51109552 is about 371.1083202911.

Adding to 51109552 its reverse (25590115), we get a palindrome (76699667).

The spelling of 51109552 in words is "fifty-one million, one hundred nine thousand, five hundred fifty-two".