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3146221 = 133137211
BaseRepresentation
bin1100000000000111101101
312220211210201
430000013231
51301134341
6151233501
735512441
oct14000755
95824721
103146221
111859891
121078891
13862090
145bc821
15422331
hex3001ed

3146221 has 16 divisors (see below), whose sum is σ = 3609088. Its totient is φ = 2721600.

The previous prime is 3146219. The next prime is 3146237. The reversal of 3146221 is 1226413.

It is a 3-Lehmer number, since φ(3146221) divides (3146221-1)3.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 3146221 - 21 = 3146219 is a prime.

It is a d-powerful number, because it can be written as 35 + 1 + 410 + 63 + 25 + 221 + 1 .

It is a deceptive number, since it divides R3146220.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3146261) 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, 14806 + ... + 15016.

It is an arithmetic number, because the mean of its divisors is an integer number (225568).

It is a Poulet number, since it divides 23146220-1.

Almost surely, 23146221 is an apocalyptic number.

3146221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3146221 is a deficient number, since it is larger than the sum of its proper divisors (462867).

3146221 is a wasteful number, since it uses less digits than its factorization.

3146221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292.

The product of its digits is 288, while the sum is 19.

The square root of 3146221 is about 1773.7590027960. The cubic root of 3146221 is about 146.5310770540.

The spelling of 3146221 in words is "three million, one hundred forty-six thousand, two hundred twenty-one".