100505105000551 has 4 divisors (see below), whose sum is σ = 104874892174512. Its totient is φ = 96135317826592.

The previous prime is 100505105000539. The next prime is 100505105000563. The reversal of 100505105000551 is 155000501505001.

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

It is an interprime number because it is at equal distance from previous prime (100505105000539) and next prime (100505105000563).

It is a cyclic number.

It is not a de Polignac number, because 100505105000551 - 2¹³ = 100505104992359 is a prime.

It is a super-2 number, since 2×100505105000551² (a number of 29 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 (100505105003551) 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, 2184893586946 + ... + 2184893586991.

It is an arithmetic number, because the mean of its divisors is an integer number (26218723043628).

Almost surely, 2^{100505105000551} is an apocalyptic number.

100505105000551 is a deficient number, since it is larger than the sum of its proper divisors (4369787173961).

100505105000551 is an equidigital number, since it uses as much as digits as its factorization.

100505105000551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4369787173960.

The product of its (nonzero) digits is 3125, while the sum is 28.

Adding to 100505105000551 its reverse (155000501505001), we get a palindrome (255505606505552).

The spelling of 100505105000551 in words is "one hundred trillion, five hundred five billion, one hundred five million, five hundred fifty-one", and thus it is an aban number.