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BaseRepresentation
bin101100010000…
…0010110111101
31121122202002012
41120200112331
521414414323
62145141005
7401131010
oct130402675
947582065
1023201213
1112107462
12792a765
134a64539
14311d377
152084678
hex16205bd

23201213 has 4 divisors (see below), whose sum is σ = 26515680. Its totient is φ = 19886748.

The previous prime is 23201197. The next prime is 23201251. The reversal of 23201213 is 31210232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23201213 - 24 = 23201197 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 (23201263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657223 + ... + 1657236.

It is an arithmetic number, because the mean of its divisors is an integer number (6628920).

Almost surely, 223201213 is an apocalyptic number.

It is an amenable number.

23201213 is a deficient number, since it is larger than the sum of its proper divisors (3314467).

23201213 is an equidigital number, since it uses as much as digits as its factorization.

23201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3314466.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 23201213 is about 4816.7637475799. The cubic root of 23201213 is about 285.2136000037.

Adding to 23201213 its reverse (31210232), we get a palindrome (54411445).

The spelling of 23201213 in words is "twenty-three million, two hundred one thousand, two hundred thirteen".

Divisors: 1 7 3314459 23201213