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4221431 = 31313487
BaseRepresentation
bin10000000110100111110111
321221110201022
4100012213313
52040041211
6230251355
750611244
oct20064767
97843638
104221431
112423695
1214b6b5b
13b4a5b6
147bc5cb
15585bdb
hex4069f7

4221431 has 4 divisors (see below), whose sum is σ = 4235232. Its totient is φ = 4207632.

The previous prime is 4221421. The next prime is 4221433. The reversal of 4221431 is 1341224.

Adding to 4221431 its reverse (1341224), we get a palindrome (5562655).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4221431 - 218 = 3959287 is a prime.

It is a super-2 number, since 2×42214312 = 35640959375522, 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 (4221433) 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, 6431 + ... + 7056.

It is an arithmetic number, because the mean of its divisors is an integer number (1058808).

Almost surely, 24221431 is an apocalyptic number.

4221431 is a deficient number, since it is larger than the sum of its proper divisors (13801).

4221431 is a wasteful number, since it uses less digits than its factorization.

4221431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13800.

The product of its digits is 192, while the sum is 17.

The square root of 4221431 is about 2054.6121288457. The cubic root of 4221431 is about 161.6168228859.

The spelling of 4221431 in words is "four million, two hundred twenty-one thousand, four hundred thirty-one".

Divisors: 1 313 13487 4221431