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55638371 is a prime number
BaseRepresentation
bin1101010000111…
…1100101100011
310212200201111102
43110033211203
5103220411441
65304305015
71243626665
oct324174543
9125621442
1055638371
1129451a28
121677216b
13b6b0919
147564535
154d4069b
hex350f963

55638371 has 2 divisors, whose sum is σ = 55638372. Its totient is φ = 55638370.

The previous prime is 55638367. The next prime is 55638389. The reversal of 55638371 is 17383655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55638371 - 22 = 55638367 is a prime.

It is not a weakly prime, because it can be changed into another prime (55638971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27819185 + 27819186.

It is an arithmetic number, because the mean of its divisors is an integer number (27819186).

Almost surely, 255638371 is an apocalyptic number.

55638371 is a deficient number, since it is larger than the sum of its proper divisors (1).

55638371 is an equidigital number, since it uses as much as digits as its factorization.

55638371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 55638371 is about 7459.1132851030. The cubic root of 55638371 is about 381.7609200890.

The spelling of 55638371 in words is "fifty-five million, six hundred thirty-eight thousand, three hundred seventy-one".