51380472 has 96 divisors (see below), whose sum is σ = 152162640. Its totient is φ = 14361600.

The previous prime is 51380471. The next prime is 51380513. The reversal of 51380472 is 27408315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51380471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37072 + ... + 38432.

Almost surely, 2^51380472 is an apocalyptic number.

51380472 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51380472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76081320).

51380472 is an abundant number, since it is smaller than the sum of its proper divisors (100782168).

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

51380472 is a wasteful number, since it uses less digits than its factorization.

51380472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405 (or 1390 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 51380472 is about 7168.0172990863. The cubic root of 51380472 is about 371.7628850829.

Adding to 51380472 its reverse (27408315), we get a palindrome (78788787).

The spelling of 51380472 in words is "fifty-one million, three hundred eighty thousand, four hundred seventy-two".