51521358354244 has 9 divisors (see below), whose sum is σ = 90162402242367. Its totient is φ = 25760671999284.

The previous prime is 51521358354223. The next prime is 51521358354247. The reversal of 51521358354244 is 44245385312515.

The square root of 51521358354244 is 7177838.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51521358354191 and 51521358354200.

It is not an unprimeable number, because it can be changed into a prime (51521358354247) 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, 12561217 + ... + 16150135.

Almost surely, 2^{51521358354244} is an apocalyptic number.

51521358354244 is the 7177838-th square number.

It is an amenable number.

51521358354244 is a deficient number, since it is larger than the sum of its proper divisors (38641043888123).

51521358354244 is an frugal number, since it uses more digits than its factorization.

51521358354244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177842 (or 3588921 counting only the distinct ones).

The product of its digits is 11520000, while the sum is 52.

The spelling of 51521358354244 in words is "fifty-one trillion, five hundred twenty-one billion, three hundred fifty-eight million, three hundred fifty-four thousand, two hundred forty-four".