51578472 has 64 divisors (see below), whose sum is σ = 145540800. Its totient is φ = 15088640.

The previous prime is 51578467. The next prime is 51578477. The reversal of 51578472 is 27487515.

It is an interprime number because it is at equal distance from previous prime (51578467) and next prime (51578477).

It is a self number, because there is not a number n which added to its sum of digits gives 51578472.

It is not an unprimeable number, because it can be changed into a prime (51578477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4288 + ... + 11024.

It is an arithmetic number, because the mean of its divisors is an integer number (2274075).

Almost surely, 2^51578472 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 51578472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72770400).

51578472 is an abundant number, since it is smaller than the sum of its proper divisors (93962328).

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

51578472 is a wasteful number, since it uses less digits than its factorization.

51578472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786 (or 6782 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 51578472 is about 7181.8153693896. The cubic root of 51578472 is about 372.2398153050.

It can be divided in two parts, 515 and 78472, that added together give a palindrome (78987).

The spelling of 51578472 in words is "fifty-one million, five hundred seventy-eight thousand, four hundred seventy-two".