51100100025 has 48 divisors (see below), whose sum is σ = 91218953280. Its totient is φ = 25092115200.

The previous prime is 51100099987. The next prime is 51100100039. The reversal of 51100100025 is 52000100115.

It is not a de Polignac number, because 51100100025 - 2¹¹ = 51100097977 is a prime.

It is a super-2 number, since 2×51100100025² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 51100099977 and 51100100013.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 311910 + ... + 446640.

It is an arithmetic number, because the mean of its divisors is an integer number (1900394860).

Almost surely, 2^51100100025 is an apocalyptic number.

It is an amenable number.

51100100025 is a deficient number, since it is larger than the sum of its proper divisors (40118853255).

51100100025 is a wasteful number, since it uses less digits than its factorization.

51100100025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135146 (or 135141 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 15.

The spelling of 51100100025 in words is "fifty-one billion, one hundred million, one hundred thousand, twenty-five".