51363172 has 36 divisors (see below), whose sum is σ = 105055104. Its totient is φ = 21908880.

The previous prime is 51363161. The next prime is 51363173. The reversal of 51363172 is 27136315.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 51363172.

It is not an unprimeable number, because it can be changed into a prime (51363173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52633 + ... + 53599.

Almost surely, 2^51363172 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 51363172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52527552).

51363172 is an abundant number, since it is smaller than the sum of its proper divisors (53691932).

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

51363172 is a wasteful number, since it uses less digits than its factorization.

51363172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256 (or 1247 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 51363172 is about 7166.8104481701. The cubic root of 51363172 is about 371.7211557407.

Adding to 51363172 its reverse (27136315), we get a palindrome (78499487).

The spelling of 51363172 in words is "fifty-one million, three hundred sixty-three thousand, one hundred seventy-two".