51145425121 has 16 divisors (see below), whose sum is σ = 60718458240. Its totient is φ = 42151576320.

The previous prime is 51145425091. The next prime is 51145425143. The reversal of 51145425121 is 12152454115.

It is not a de Polignac number, because 51145425121 - 2⁹ = 51145424609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51145420121) 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, 473791 + ... + 571636.

It is an arithmetic number, because the mean of its divisors is an integer number (3794903640).

Almost surely, 2^51145425121 is an apocalyptic number.

It is an amenable number.

51145425121 is a deficient number, since it is larger than the sum of its proper divisors (9573033119).

51145425121 is a wasteful number, since it uses less digits than its factorization.

51145425121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045704.

The product of its digits is 8000, while the sum is 31.

Adding to 51145425121 its reverse (12152454115), we get a palindrome (63297879236).

The spelling of 51145425121 in words is "fifty-one billion, one hundred forty-five million, four hundred twenty-five thousand, one hundred twenty-one".