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67381201 = 1971199251
BaseRepresentation
bin1000000010000…
…10011111010001
311200210022122001
410001002133101
5114222144301
610404114001
71445505436
oct401023721
9150708561
1067381201
1135042548
121a695901
1310c62844
148d3db8d
155daec01
hex40427d1

67381201 has 16 divisors (see below), whose sum is σ = 72576000. Its totient is φ = 62370000.

The previous prime is 67381187. The next prime is 67381211. The reversal of 67381201 is 10218376.

It is a cyclic number.

It is not a de Polignac number, because 67381201 - 215 = 67348433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67381201.

It is not an unprimeable number, because it can be changed into a prime (67381211) 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, 268326 + ... + 268576.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 267381201 is an apocalyptic number.

It is an amenable number.

67381201 is a deficient number, since it is larger than the sum of its proper divisors (5194799).

67381201 is a wasteful number, since it uses less digits than its factorization.

67381201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 67381201 is about 8208.6053017550. The cubic root of 67381201 is about 406.9236354785.

Adding to 67381201 its reverse (10218376), we get a palindrome (77599577).

The spelling of 67381201 in words is "sixty-seven million, three hundred eighty-one thousand, two hundred one".

Divisors: 1 19 71 199 251 1349 3781 4769 14129 17821 49949 268451 338599 949031 3546379 67381201