51244320 has 48 divisors (see below), whose sum is σ = 161421120. Its totient is φ = 13665024.

The previous prime is 51244313. The next prime is 51244327. The reversal of 51244320 is 2344215.

It is an interprime number because it is at equal distance from previous prime (51244313) and next prime (51244327).

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (51244327) 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, 52900 + ... + 53859.

It is an arithmetic number, because the mean of its divisors is an integer number (3362940).

Almost surely, 2^51244320 is an apocalyptic number.

It is an amenable number.

51244320 is an abundant number, since it is smaller than the sum of its proper divisors (110176800).

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

51244320 is a wasteful number, since it uses less digits than its factorization.

51244320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106777 (or 106769 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51244320 is about 7158.5138122378. The cubic root of 51244320 is about 371.4342191308.

Adding to 51244320 its reverse (2344215), we get a palindrome (53588535).

The spelling of 51244320 in words is "fifty-one million, two hundred forty-four thousand, three hundred twenty".