51100112251 has 2 divisors, whose sum is σ = 51100112252. Its totient is φ = 51100112250.

The previous prime is 51100112243. The next prime is 51100112317. The reversal of 51100112251 is 15221100115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51100112251 - 2³ = 51100112243 is a prime.

It is a super-2 number, since 2×51100112251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51100119251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25550056125 + 25550056126.

It is an arithmetic number, because the mean of its divisors is an integer number (25550056126).

Almost surely, 2^51100112251 is an apocalyptic number.

51100112251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51100112251 is an equidigital number, since it uses as much as digits as its factorization.

51100112251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 51100112251 its reverse (15221100115), we get a palindrome (66321212366).

The spelling of 51100112251 in words is "fifty-one billion, one hundred million, one hundred twelve thousand, two hundred fifty-one".