22155206403511 has 4 divisors (see below), whose sum is σ = 22176048555472. Its totient is φ = 22134364251552.

The previous prime is 22155206403481. The next prime is 22155206403529. The reversal of 22155206403511 is 11530460255122.

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

It is a cyclic number.

It is not a de Polignac number, because 22155206403511 - 2²⁵ = 22155172849079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155206403611) 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, 10421074386 + ... + 10421076511.

It is an arithmetic number, because the mean of its divisors is an integer number (5544012138868).

Almost surely, 2^{22155206403511} is an apocalyptic number.

22155206403511 is a deficient number, since it is larger than the sum of its proper divisors (20842151961).

22155206403511 is a wasteful number, since it uses less digits than its factorization.

22155206403511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20842151960.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 22155206403511 its reverse (11530460255122), we get a palindrome (33685666658633).

The spelling of 22155206403511 in words is "twenty-two trillion, one hundred fifty-five billion, two hundred six million, four hundred three thousand, five hundred eleven".