51369769201 has 3 divisors (see below), whose sum is σ = 51369995851. Its totient is φ = 51369542552.

The previous prime is 51369769189. The next prime is 51369769219. The reversal of 51369769201 is 10296796315.

The square root of 51369769201 is 226649.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 50445609201 + 924160000 = 224601^2 + 30400^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51369769201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51369763201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 113325 + ... + 339973.

Almost surely, 2^51369769201 is an apocalyptic number.

51369769201 is the 226649-th square number.

51369769201 is the 113325-th centered octagonal number.

It is an amenable number.

51369769201 is a deficient number, since it is larger than the sum of its proper divisors (226650).

51369769201 is an frugal number, since it uses more digits than its factorization.

51369769201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453298 (or 226649 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

Multiplying 51369769201 by its sum of digits (49), we get a square (2517118690849 = 1586543²).

The spelling of 51369769201 in words is "fifty-one billion, three hundred sixty-nine million, seven hundred sixty-nine thousand, two hundred one".