22155387641 has 6 divisors (see below), whose sum is σ = 22206860910. Its totient is φ = 22104033408.

The previous prime is 22155387637. The next prime is 22155387671. The reversal of 22155387641 is 14678355122.

It can be written as a sum of positive squares in 3 ways, for example, as 2042041 + 22153345600 = 1429^2 + 148840^2 .

It is not a de Polignac number, because 22155387641 - 2² = 22155387637 is a prime.

It is a super-2 number, since 2×22155387641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22155387592 and 22155387601.

It is not an unprimeable number, because it can be changed into a prime (22155387671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128405 + ... + 246573.

It is an arithmetic number, because the mean of its divisors is an integer number (3701143485).

Almost surely, 2^22155387641 is an apocalyptic number.

It is an amenable number.

22155387641 is a deficient number, since it is larger than the sum of its proper divisors (51473269).

22155387641 is an frugal number, since it uses more digits than its factorization.

22155387641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119035 (or 118602 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The spelling of 22155387641 in words is "twenty-two billion, one hundred fifty-five million, three hundred eighty-seven thousand, six hundred forty-one".