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223869997 = 1343557719
BaseRepresentation
bin11010101011111…
…11110000101101
3120121020202220101
431111333300231
5424302314442
634114151101
75355602131
oct1525776055
9517222811
10223869997
1110540692a
1262b82491
13374c4070
1421a373c1
15149c1cb7
hexd57fc2d

223869997 has 16 divisors (see below), whose sum is σ = 247484160. Its totient is φ = 201200832.

The previous prime is 223869979. The next prime is 223870021. The reversal of 223869997 is 799968322.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 223869997 - 223 = 215481389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223869917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311004 + ... + 311722.

It is an arithmetic number, because the mean of its divisors is an integer number (15467760).

Almost surely, 2223869997 is an apocalyptic number.

It is an amenable number.

223869997 is a deficient number, since it is larger than the sum of its proper divisors (23614163).

223869997 is a wasteful number, since it uses less digits than its factorization.

223869997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332.

The product of its digits is 2939328, while the sum is 55.

The square root of 223869997 is about 14962.2858213576. The cubic root of 223869997 is about 607.2002818540.

The spelling of 223869997 in words is "two hundred twenty-three million, eight hundred sixty-nine thousand, nine hundred ninety-seven".

Divisors: 1 13 43 557 559 719 7241 9347 23951 30917 311363 400483 401921 5206279 17220769 223869997