51472361 has 4 divisors (see below), whose sum is σ = 53247300. Its totient is φ = 49697424.

The previous prime is 51472339. The next prime is 51472391. The reversal of 51472361 is 16327415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39438400 + 12033961 = 6280^2 + 3469^2 .

It is a cyclic number.

It is not a de Polignac number, because 51472361 - 2⁶ = 51472297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1774909 = 51472361 / (5 + 1 + 4 + 7 + 2 + 3 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51472301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887426 + ... + 887483.

It is an arithmetic number, because the mean of its divisors is an integer number (13311825).

Almost surely, 2^51472361 is an apocalyptic number.

51472361 is the 3209-th centered decagonal number.

It is an amenable number.

51472361 is a deficient number, since it is larger than the sum of its proper divisors (1774939).

51472361 is a wasteful number, since it uses less digits than its factorization.

51472361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1774938.

The product of its digits is 5040, while the sum is 29.

The square root of 51472361 is about 7174.4240883851. The cubic root of 51472361 is about 371.9843737414.

Adding to 51472361 its reverse (16327415), we get a palindrome (67799776).

The spelling of 51472361 in words is "fifty-one million, four hundred seventy-two thousand, three hundred sixty-one".