51230856081 has 16 divisors (see below), whose sum is σ = 69344251200. Its totient is φ = 33635931648.

The previous prime is 51230856067. The next prime is 51230856097. The reversal of 51230856081 is 18065803215.

It is not a de Polignac number, because 51230856081 - 2¹⁵ = 51230823313 is a prime.

It is a super-2 number, since 2×51230856081² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51230852081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 857305 + ... + 915113.

It is an arithmetic number, because the mean of its divisors is an integer number (4334015700).

Almost surely, 2^51230856081 is an apocalyptic number.

It is an amenable number.

51230856081 is a deficient number, since it is larger than the sum of its proper divisors (18113395119).

51230856081 is a wasteful number, since it uses less digits than its factorization.

51230856081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62288.

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 51230856081 in words is "fifty-one billion, two hundred thirty million, eight hundred fifty-six thousand, eighty-one".