51651424 has 48 divisors (see below), whose sum is σ = 116786880. Its totient is φ = 22239360.

The previous prime is 51651421. The next prime is 51651437. The reversal of 51651424 is 42415615.

It is a junction number, because it is equal to n+sod(n) for n = 51651392 and 51651401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2827 + ... + 10549.

It is an arithmetic number, because the mean of its divisors is an integer number (2433060).

Almost surely, 2^51651424 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 51651424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58393440).

51651424 is an abundant number, since it is smaller than the sum of its proper divisors (65135456).

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

51651424 is a wasteful number, since it uses less digits than its factorization.

51651424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7763 (or 7755 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 51651424 is about 7186.8925134581. The cubic root of 51651424 is about 372.4152298732.

The spelling of 51651424 in words is "fifty-one million, six hundred fifty-one thousand, four hundred twenty-four".