51147552 has 48 divisors (see below), whose sum is σ = 135263520. Its totient is φ = 16922112.

The previous prime is 51147539. The next prime is 51147553. The reversal of 51147552 is 25574115.

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 (51147553) 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, 11428 + ... + 15260.

It is an arithmetic number, because the mean of its divisors is an integer number (2817990).

Almost surely, 2^51147552 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 51147552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67631760).

51147552 is an abundant number, since it is smaller than the sum of its proper divisors (84115968).

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

51147552 is a wasteful number, since it uses less digits than its factorization.

51147552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985 (or 3977 counting only the distinct ones).

The product of its digits is 7000, while the sum is 30.

The square root of 51147552 is about 7151.7516735412. The cubic root of 51147552 is about 371.2002706350.

The spelling of 51147552 in words is "fifty-one million, one hundred forty-seven thousand, five hundred fifty-two".