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221100093 = 32191292983
BaseRepresentation
bin11010010110110…
…11100000111101
3120102001001022100
431023123200331
5423100200333
633534535313
75323214454
oct1513334075
9512031270
10221100093
11103894855
1262067539
1336a64376
1421515b9b
1514626213
hexd2db83d

221100093 has 12 divisors (see below), whose sum is σ = 336175840. Its totient is φ = 139642056.

The previous prime is 221100059. The next prime is 221100101. The reversal of 221100093 is 390001122.

It is a happy number.

It is not a de Polignac number, because 221100093 - 29 = 221099581 is a prime.

It is a super-2 number, since 2×2211000932 = 97770502249217298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646321 + ... + 646662.

Almost surely, 2221100093 is an apocalyptic number.

It is an amenable number.

221100093 is a deficient number, since it is larger than the sum of its proper divisors (115075747).

221100093 is a wasteful number, since it uses less digits than its factorization.

221100093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293008 (or 1293005 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 221100093 is about 14869.4348581242. The cubic root of 221100093 is about 604.6856213350.

The spelling of 221100093 in words is "two hundred twenty-one million, one hundred thousand, ninety-three".

Divisors: 1 3 9 19 57 171 1292983 3878949 11636847 24566677 73700031 221100093