51951744 has 96 divisors (see below), whose sum is σ = 161042700. Its totient is φ = 15980544.

The previous prime is 51951709. The next prime is 51951749. The reversal of 51951744 is 44715915.

It can be written as a sum of positive squares in 2 ways, for example, as 39841344 + 12110400 = 6312^2 + 3480^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 51951699 and 51951708.

It is not an unprimeable number, because it can be changed into a prime (51951749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13242 + ... + 16710.

Almost surely, 2^51951744 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 51951744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80521350).

51951744 is an abundant number, since it is smaller than the sum of its proper divisors (109090956).

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

51951744 is a wasteful number, since it uses less digits than its factorization.

51951744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502 (or 3487 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 51951744 is about 7207.7558227232. The cubic root of 51951744 is about 373.1356209362.

The spelling of 51951744 in words is "fifty-one million, nine hundred fifty-one thousand, seven hundred forty-four".