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1838214231 = 37515316987
BaseRepresentation
bin110110110010000…
…1110110001010111
311202002220221212120
41231210032301113
512231040323411
6502223151023
763360364110
oct15544166127
94662827776
101838214231
11863695617
12433745473
13233aacb39
141361c3207
15ab5a6106
hex6d90ec57

1838214231 has 16 divisors (see below), whose sum is σ = 2801796864. Its totient is φ = 1050142464.

The previous prime is 1838214229. The next prime is 1838214253. The reversal of 1838214231 is 1324128381.

It is not a de Polignac number, because 1838214231 - 21 = 1838214229 is a prime.

It is a super-2 number, since 2×18382142312 = 6758063118101842722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1838214192 and 1838214201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838214221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99720 + ... + 116706.

It is an arithmetic number, because the mean of its divisors is an integer number (175112304).

Almost surely, 21838214231 is an apocalyptic number.

1838214231 is a deficient number, since it is larger than the sum of its proper divisors (963582633).

1838214231 is a wasteful number, since it uses less digits than its factorization.

1838214231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22150.

The product of its digits is 9216, while the sum is 33.

The square root of 1838214231 is about 42874.4006488720. The cubic root of 1838214231 is about 1224.9885837614.

The spelling of 1838214231 in words is "one billion, eight hundred thirty-eight million, two hundred fourteen thousand, two hundred thirty-one".

Divisors: 1 3 7 21 5153 15459 16987 36071 50961 108213 118909 356727 87534011 262602033 612738077 1838214231