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214404215 = 5312934721
BaseRepresentation
bin11001100011110…
…00110001110111
3112221102212021212
430301320301313
5414341413330
633135232035
75212256114
oct1461706167
9487385255
10214404215
11100031073
125b97861b
133555b6cc
142069190b
1513c52295
hexcc78c77

214404215 has 16 divisors (see below), whose sum is σ = 266547456. Its totient is φ = 165388800.

The previous prime is 214404193. The next prime is 214404247. The reversal of 214404215 is 512404412.

It is a de Polignac number, because none of the positive numbers 2k-214404215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43055 + ... + 47775.

It is an arithmetic number, because the mean of its divisors is an integer number (16659216).

Almost surely, 2214404215 is an apocalyptic number.

214404215 is a deficient number, since it is larger than the sum of its proper divisors (52143241).

214404215 is a wasteful number, since it uses less digits than its factorization.

214404215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 214404215 is about 14642.5481047528. The cubic root of 214404215 is about 598.5187675562.

Adding to 214404215 its reverse (512404412), we get a palindrome (726808627).

The spelling of 214404215 in words is "two hundred fourteen million, four hundred four thousand, two hundred fifteen".

Divisors: 1 5 31 155 293 1465 4721 9083 23605 45415 146351 731755 1383253 6916265 42880843 214404215