22255110120400 has 30 divisors (see below), whose sum is σ = 53467902065222. Its totient is φ = 8902044048000.

The previous prime is 22255110120391. The next prime is 22255110120409. The reversal of 22255110120400 is 402101155222.

It is an interprime number because it is at equal distance from previous prime (22255110120391) and next prime (22255110120409).

It can be written as a sum of positive squares in 3 ways, for example, as 166689292176 + 22088420828224 = 408276^2 + 4699832^2 .

It is a super-2 number, since 2×22255110120400² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22255110120409) 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, 27818887251 + ... + 27818888050.

Almost surely, 2^{22255110120400} is an apocalyptic number.

22255110120400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22255110120400 is an abundant number, since it is smaller than the sum of its proper divisors (31212791944822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22255110120400 is a wasteful number, since it uses less digits than its factorization.

22255110120400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55637775319 (or 55637775308 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 22255110120400 its reverse (402101155222), we get a palindrome (22657211275622).

The spelling of 22255110120400 in words is "twenty-two trillion, two hundred fifty-five billion, one hundred ten million, one hundred twenty thousand, four hundred".