51123744 has 192 divisors, whose sum is σ = 174182400. Its totient is φ = 14287104.

The previous prime is 51123739. The next prime is 51123757. The reversal of 51123744 is 44732115.

It is a super-2 number, since 2×51123744² = 5227274401155072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477739 + ... + 477845.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^51123744 is an apocalyptic number.

51123744 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51123744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87091200).

51123744 is an abundant number, since it is smaller than the sum of its proper divisors (123058656).

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

51123744 is a wasteful number, since it uses less digits than its factorization.

51123744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 198 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51123744 is about 7150.0869924778. The cubic root of 51123744 is about 371.1426666554.

Adding to 51123744 its reverse (44732115), we get a palindrome (95855859).

The spelling of 51123744 in words is "fifty-one million, one hundred twenty-three thousand, seven hundred forty-four".