51275526481 has 9 divisors (see below), whose sum is σ = 51711452361. Its totient is φ = 50843250612.

The previous prime is 51275526451. The next prime is 51275526493. The reversal of 51275526481 is 18462557215.

The square root of 51275526481 is 226441.

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

It is not a de Polignac number, because 51275526481 - 2¹⁵ = 51275493713 is a prime.

It is a super-2 number, since 2×51275526481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51275526451) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28757116 + ... + 28758898.

It is an arithmetic number, because the mean of its divisors is an integer number (5745716929).

Almost surely, 2^51275526481 is an apocalyptic number.

51275526481 is the 226441-st square number.

51275526481 is the 113221-st centered octagonal number.

It is an amenable number.

51275526481 is a deficient number, since it is larger than the sum of its proper divisors (435925880).

51275526481 is an frugal number, since it uses more digits than its factorization.

51275526481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820 (or 1910 counting only the distinct ones).

The product of its digits is 672000, while the sum is 46.

The spelling of 51275526481 in words is "fifty-one billion, two hundred seventy-five million, five hundred twenty-six thousand, four hundred eighty-one".