Search a number
-
+
2101222128 = 24343775461
BaseRepresentation
bin111110100111110…
…0001101011110000
312102102211010212210
41331033201223300
513300403102003
6544300252120
7103033044015
oct17517415360
95372733783
102101222128
119890a3315
124a7841040
13276428205
1415d0c770c
15c4709503
hex7d3e1af0

2101222128 has 20 divisors (see below), whose sum is σ = 5428157288. Its totient is φ = 700407360.

The previous prime is 2101222121. The next prime is 2101222163. The reversal of 2101222128 is 8212221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101222121) 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, 21887683 + ... + 21887778.

Almost surely, 22101222128 is an apocalyptic number.

It is an amenable number.

2101222128 is an abundant number, since it is smaller than the sum of its proper divisors (3326935160).

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

2101222128 is a wasteful number, since it uses less digits than its factorization.

2101222128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43775472 (or 43775466 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2101222128 is about 45839.0895197538. The cubic root of 2101222128 is about 1280.8275345357.

The spelling of 2101222128 in words is "two billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-eight".

Divisors: 1 2 3 4 6 8 12 16 24 48 43775461 87550922 131326383 175101844 262652766 350203688 525305532 700407376 1050611064 2101222128