100556223405 has 64 divisors (see below), whose sum is σ = 189795115008. Its totient is φ = 44910248960.

The previous prime is 100556223403. The next prime is 100556223431. The reversal of 100556223405 is 504322655001.

It is not a de Polignac number, because 100556223405 - 2¹ = 100556223403 is a prime.

It is a super-2 number, since 2×100556223405² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100556223401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 249537 + ... + 513206.

It is an arithmetic number, because the mean of its divisors is an integer number (2965548672).

Almost surely, 2^100556223405 is an apocalyptic number.

100556223405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100556223405 is a deficient number, since it is larger than the sum of its proper divisors (89238891603).

100556223405 is a wasteful number, since it uses less digits than its factorization.

100556223405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762826.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 100556223405 its reverse (504322655001), we get a palindrome (604878878406).

The spelling of 100556223405 in words is "one hundred billion, five hundred fifty-six million, two hundred twenty-three thousand, four hundred five".