23122155505 has 16 divisors (see below), whose sum is σ = 28304807184. Its totient is φ = 18126434560.

The previous prime is 23122155499. The next prime is 23122155509. The reversal of 23122155505 is 50555122132.

It can be written as a sum of positive squares in 8 ways, for example, as 2223405409 + 20898750096 = 47153^2 + 144564^2 .

It is not a de Polignac number, because 23122155505 - 2¹⁷ = 23122024433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23122155509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164427 + ... + 270703.

It is an arithmetic number, because the mean of its divisors is an integer number (1769050449).

Almost surely, 2^23122155505 is an apocalyptic number.

It is an amenable number.

23122155505 is a deficient number, since it is larger than the sum of its proper divisors (5182651679).

23122155505 is a wasteful number, since it uses less digits than its factorization.

23122155505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107156.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 23122155505 its reverse (50555122132), we get a palindrome (73677277637).

The spelling of 23122155505 in words is "twenty-three billion, one hundred twenty-two million, one hundred fifty-five thousand, five hundred five".