51103128893525 has 6 divisors (see below), whose sum is σ = 63367879828002. Its totient is φ = 40882503114800.

The previous prime is 51103128893521. The next prime is 51103128893543. The reversal of 51103128893525 is 52539882130115.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15921041653924 + 35182087239601 = 3990118^2 + 5931449^2 .

It is not a de Polignac number, because 51103128893525 - 2² = 51103128893521 is a prime.

It is a super-2 number, since 2×51103128893525² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51103128893521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1022062577846 + ... + 1022062577895.

It is an arithmetic number, because the mean of its divisors is an integer number (10561313304667).

Almost surely, 2^{51103128893525} is an apocalyptic number.

It is an amenable number.

51103128893525 is a deficient number, since it is larger than the sum of its proper divisors (12264750934477).

51103128893525 is a wasteful number, since it uses less digits than its factorization.

51103128893525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044125155751 (or 2044125155746 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 53.

The spelling of 51103128893525 in words is "fifty-one trillion, one hundred three billion, one hundred twenty-eight million, eight hundred ninety-three thousand, five hundred twenty-five".