51501472 has 72 divisors (see below), whose sum is σ = 114222528. Its totient is φ = 22830720.

The previous prime is 51501469. The next prime is 51501473. The reversal of 51501472 is 27410515.

It is not an unprimeable number, because it can be changed into a prime (51501473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181843 + ... + 182125.

It is an arithmetic number, because the mean of its divisors is an integer number (1586424).

Almost surely, 2^51501472 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 51501472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57111264).

51501472 is an abundant number, since it is smaller than the sum of its proper divisors (62721056).

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

51501472 is a wasteful number, since it uses less digits than its factorization.

51501472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 51501472 is about 7176.4526055705. The cubic root of 51501472 is about 372.0544877214.

Adding to 51501472 its reverse (27410515), we get a palindrome (78911987).

The spelling of 51501472 in words is "fifty-one million, five hundred one thousand, four hundred seventy-two".