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71211196 = 2272543257
BaseRepresentation
bin1000011111010…
…01100010111100
311221222220101201
410033221202330
5121212224241
611022145244
71523166550
oct417514274
9157886351
1071211196
1137219031
121ba22224
13119a3c04
149659860
1563b9931
hex43e98bc

71211196 has 12 divisors (see below), whose sum is σ = 142422448. Its totient is φ = 30519072.

The previous prime is 71211193. The next prime is 71211209. The reversal of 71211196 is 69111217.

71211196 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 2543257 = 71211196 / (7 + 1 + 2 + 1 + 1 + 1 + 9 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71211193) 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, 1271601 + ... + 1271656.

Almost surely, 271211196 is an apocalyptic number.

It is an amenable number.

71211196 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71211196 is a wasteful number, since it uses less digits than its factorization.

71211196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2543268 (or 2543266 counting only the distinct ones).

The product of its digits is 756, while the sum is 28.

The square root of 71211196 is about 8438.6726444388. The cubic root of 71211196 is about 414.4919432325.

The spelling of 71211196 in words is "seventy-one million, two hundred eleven thousand, one hundred ninety-six".

Divisors: 1 2 4 7 14 28 2543257 5086514 10173028 17802799 35605598 71211196