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219740542 = 2752330011
BaseRepresentation
bin11010001100011…
…11100101111110
3120022110222100121
431012033211332
5422223144132
633445445154
75305522660
oct1506174576
9508428317
10219740542
1110304635a
12617107ba
13366a95b8
1421280530
1514458497
hexd18f97e

219740542 has 16 divisors (see below), whose sum is σ = 377430912. Its totient is φ = 93991320.

The previous prime is 219740539. The next prime is 219740593. The reversal of 219740542 is 245047912.

It is a super-3 number, since 3×2197405423 (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 219740498 and 219740507.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7684 + ... + 22327.

It is an arithmetic number, because the mean of its divisors is an integer number (23589432).

Almost surely, 2219740542 is an apocalyptic number.

219740542 is a deficient number, since it is larger than the sum of its proper divisors (157690370).

219740542 is a wasteful number, since it uses less digits than its factorization.

219740542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30543.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 219740542 is about 14823.6480665186. The cubic root of 219740542 is about 603.4436623185.

The spelling of 219740542 in words is "two hundred nineteen million, seven hundred forty thousand, five hundred forty-two".

Divisors: 1 2 7 14 523 1046 3661 7322 30011 60022 210077 420154 15695753 31391506 109870271 219740542