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55422222 = 239237037
BaseRepresentation
bin1101001101101…
…0110100001110
310212021201222220
43103122310032
5103142002342
65255520210
71242036552
oct323326416
9125251886
1055422222
1129314599
1216689066
13b63641b
147509862
154ceb5ec
hex34dad0e

55422222 has 8 divisors (see below), whose sum is σ = 110844456. Its totient is φ = 18474072.

The previous prime is 55422209. The next prime is 55422229. The reversal of 55422222 is 22222455.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

55422222 is an admirable number.

55422222 is a modest number, since divided by 22222 gives 554 as remainder.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 55422192 and 55422201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55422229) 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, 4618513 + ... + 4618524.

It is an arithmetic number, because the mean of its divisors is an integer number (13855557).

Almost surely, 255422222 is an apocalyptic number.

55422222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55422222 is a wasteful number, since it uses less digits than its factorization.

55422222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9237042.

The product of its digits is 3200, while the sum is 24.

The square root of 55422222 is about 7444.6102651516. The cubic root of 55422222 is about 381.2659120117.

Adding to 55422222 its reverse (22222455), we get a palindrome (77644677).

The spelling of 55422222 in words is "fifty-five million, four hundred twenty-two thousand, two hundred twenty-two".

Divisors: 1 2 3 6 9237037 18474074 27711111 55422222