51109744 has 80 divisors (see below), whose sum is σ = 118048000. Its totient is φ = 21422016.

The previous prime is 51109717. The next prime is 51109771. The reversal of 51109744 is 44790115.

It is an interprime number because it is at equal distance from previous prime (51109717) and next prime (51109771).

It is a super-2 number, since 2×51109744² = 5224411863491072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 367627 + ... + 367765.

It is an arithmetic number, because the mean of its divisors is an integer number (1475600).

Almost surely, 2^51109744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51109744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59024000).

51109744 is an abundant number, since it is smaller than the sum of its proper divisors (66938256).

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

51109744 is a wasteful number, since it uses less digits than its factorization.

51109744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 51109744 is about 7149.1079163767. The cubic root of 51109744 is about 371.1087849969.

Adding to 51109744 its reverse (44790115), we get a palindrome (95899859).

The spelling of 51109744 in words is "fifty-one million, one hundred nine thousand, seven hundred forty-four".