51100306253 has 4 divisors (see below), whose sum is σ = 52346655228. Its totient is φ = 49853957280.

The previous prime is 51100306237. The next prime is 51100306339. The reversal of 51100306253 is 35260300115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18171848809 + 32928457444 = 134803^2 + 181462^2 .

It is a cyclic number.

It is not a de Polignac number, because 51100306253 - 2⁴ = 51100306237 is a prime.

It is a super-2 number, since 2×51100306253² (a number of 22 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 (51100306223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623174426 + ... + 623174507.

It is an arithmetic number, because the mean of its divisors is an integer number (13086663807).

Almost surely, 2^51100306253 is an apocalyptic number.

It is an amenable number.

51100306253 is a deficient number, since it is larger than the sum of its proper divisors (1246348975).

51100306253 is a wasteful number, since it uses less digits than its factorization.

51100306253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246348974.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 51100306253 its reverse (35260300115), we get a palindrome (86360606368).

The spelling of 51100306253 in words is "fifty-one billion, one hundred million, three hundred six thousand, two hundred fifty-three".