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223864801938 = 2321115212
BaseRepresentation
bin1101000001111101100…
…0011100101010010010
3210101211112010020022200
43100133120130222102
512131433342130223
6250501515344030
722113402264021
oct3203730345222
9711745106280
10223864801938
1186a38932108
1237477a52016
13181585cca5b
14ab997a68b8
155c5365ba43
hex341f61ca92

223864801938 has 18 divisors (see below), whose sum is σ = 485044753557. Its totient is φ = 74620931520.

The previous prime is 223864801931. The next prime is 223864801973. The reversal of 223864801938 is 839108468322.

It can be written as a sum of positive squares in 2 ways, for example, as 223225066089 + 639735849 = 472467^2 + 25293^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅BA, here for A=2, B=334563.

It is not an unprimeable number, because it can be changed into a prime (223864801931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1951618 + ... + 2063138.

Almost surely, 2223864801938 is an apocalyptic number.

223864801938 is an abundant number, since it is smaller than the sum of its proper divisors (261179951619).

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

223864801938 is an frugal number, since it uses more digits than its factorization.

223864801938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223050 (or 111526 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 223864801938 in words is "two hundred twenty-three billion, eight hundred sixty-four million, eight hundred one thousand, nine hundred thirty-eight".

Divisors: 1 2 3 6 9 18 111521 223042 334563 669126 1003689 2007378 12436933441 24873866882 37310800323 74621600646 111932400969 223864801938