51447396 has 96 divisors (see below), whose sum is σ = 161215488. Its totient is φ = 12332160.

The previous prime is 51447391. The next prime is 51447437. The reversal of 51447396 is 69374415.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (51447391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9871 + ... + 14153.

It is an arithmetic number, because the mean of its divisors is an integer number (1679328).

Almost surely, 2^51447396 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 51447396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80607744).

51447396 is an abundant number, since it is smaller than the sum of its proper divisors (109768092).

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

51447396 is a wasteful number, since it uses less digits than its factorization.

51447396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321 (or 4319 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 51447396 is about 7172.6840164613. The cubic root of 51447396 is about 371.9242243622.

The spelling of 51447396 in words is "fifty-one million, four hundred forty-seven thousand, three hundred ninety-six".