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221202245 = 5117435413
BaseRepresentation
bin11010010111101…
…00011101000101
3120102020020102202
431023310131011
5423111432440
633541044245
75324121335
oct1513643505
9512206382
10221202245
11103954580
12620b6685
1336a9ba04
14215410c5
1514646615
hexd2f4745

221202245 has 16 divisors (see below), whose sum is σ = 290017152. Its totient is φ = 160628160.

The previous prime is 221202239. The next prime is 221202263. The reversal of 221202245 is 542202122.

It is not a de Polignac number, because 221202245 - 216 = 221136709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38159 + ... + 43571.

It is an arithmetic number, because the mean of its divisors is an integer number (18126072).

Almost surely, 2221202245 is an apocalyptic number.

It is an amenable number.

221202245 is a deficient number, since it is larger than the sum of its proper divisors (68814907).

221202245 is a wasteful number, since it uses less digits than its factorization.

221202245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 221202245 is about 14872.8694272491. The cubic root of 221202245 is about 604.7787320076.

Adding to 221202245 its reverse (542202122), we get a palindrome (763404367).

The spelling of 221202245 in words is "two hundred twenty-one million, two hundred two thousand, two hundred forty-five".

Divisors: 1 5 11 55 743 3715 5413 8173 27065 40865 59543 297715 4021859 20109295 44240449 221202245