51443244234409 has 2 divisors, whose sum is σ = 51443244234410. Its totient is φ = 51443244234408.

The previous prime is 51443244234269. The next prime is 51443244234433. The reversal of 51443244234409 is 90443244234415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38901765688384 + 12541478546025 = 6237128^2 + 3541395^2 .

It is a cyclic number.

It is not a de Polignac number, because 51443244234409 - 2¹⁹ = 51443243710121 is a prime.

It is a super-2 number, since 2×51443244234409² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51443244234449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721622117204 + 25721622117205.

It is an arithmetic number, because the mean of its divisors is an integer number (25721622117205).

Almost surely, 2^{51443244234409} is an apocalyptic number.

It is an amenable number.

51443244234409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51443244234409 is an equidigital number, since it uses as much as digits as its factorization.

51443244234409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6635520, while the sum is 49.

The spelling of 51443244234409 in words is "fifty-one trillion, four hundred forty-three billion, two hundred forty-four million, two hundred thirty-four thousand, four hundred nine".