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233023221 = 3237276947
BaseRepresentation
bin11011110001110…
…10011011110101
3121020110210202200
431320322123311
5434123220341
635042255113
75526443664
oct1570723365
9536423680
10233023221
1110a598882
1266057499
133937a382
1422d3addb
15156cddb6
hexde3a6f5

233023221 has 12 divisors (see below), whose sum is σ = 336727872. Its totient is φ = 155284776.

The previous prime is 233023211. The next prime is 233023237. The reversal of 233023221 is 122320332.

It is a happy number.

It is not a de Polignac number, because 233023221 - 26 = 233023157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 233023194 and 233023203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233023211) 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, 30070 + ... + 37016.

It is an arithmetic number, because the mean of its divisors is an integer number (28060656).

Almost surely, 2233023221 is an apocalyptic number.

It is an amenable number.

233023221 is a deficient number, since it is larger than the sum of its proper divisors (103704651).

233023221 is a wasteful number, since it uses less digits than its factorization.

233023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680 (or 10677 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 233023221 is about 15265.0981326685. The cubic root of 233023221 is about 615.3653906402.

Adding to 233023221 its reverse (122320332), we get a palindrome (355343553).

The spelling of 233023221 in words is "two hundred thirty-three million, twenty-three thousand, two hundred twenty-one".

Divisors: 1 3 9 3727 6947 11181 20841 33543 62523 25891469 77674407 233023221