51254243236 has 81 divisors (see below), whose sum is σ = 106037199009. Its totient is φ = 21614287968.

The previous prime is 51254243219. The next prime is 51254243237. The reversal of 51254243236 is 63234245215.

The square root of 51254243236 is 226394.

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

It can be written as a sum of positive squares in only one way, i.e., 15023404900 + 36230838336 = 122570^2 + 190344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51254243195 and 51254243204.

It is not an unprimeable number, because it can be changed into a prime (51254243237) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 326460070 + ... + 326460226.

Almost surely, 2^51254243236 is an apocalyptic number.

51254243236 is the 226394-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51254243236

51254243236 is an abundant number, since it is smaller than the sum of its proper divisors (54782955773).

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

51254243236 is a wasteful number, since it uses less digits than its factorization.

51254243236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 269 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

The spelling of 51254243236 in words is "fifty-one billion, two hundred fifty-four million, two hundred forty-three thousand, two hundred thirty-six".