51497472 has 80 divisors (see below), whose sum is σ = 147803040. Its totient is φ = 15839232.

The previous prime is 51497431. The next prime is 51497497. The reversal of 51497472 is 27479415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51497472.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18679 + ... + 21257.

It is an arithmetic number, because the mean of its divisors is an integer number (1847538).

Almost surely, 2^51497472 is an apocalyptic number.

51497472 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 51497472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73901520).

51497472 is an abundant number, since it is smaller than the sum of its proper divisors (96305568).

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

51497472 is a wasteful number, since it uses less digits than its factorization.

51497472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613 (or 2597 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 51497472 is about 7176.1739109361. The cubic root of 51497472 is about 372.0448552687.

It can be divided in two parts, 5149 and 7472, that added together give a palindrome (12621).

The spelling of 51497472 in words is "fifty-one million, four hundred ninety-seven thousand, four hundred seventy-two".