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54002057 = 81166587
BaseRepresentation
bin1100111000000…
…0000110001001
310202121120220012
43032000012021
5102311031212
65205241305
71224003254
oct316000611
9122546805
1054002057
11285345aa
1216103235
13b259ba5
14725a09b
154b1a922
hex3380189

54002057 has 4 divisors (see below), whose sum is σ = 54069456. Its totient is φ = 53934660.

The previous prime is 54002021. The next prime is 54002087. The reversal of 54002057 is 75020045.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75020045 = 515004009.

It is a cyclic number.

It is not a de Polignac number, because 54002057 - 26 = 54001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54002087) 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, 32483 + ... + 34104.

It is an arithmetic number, because the mean of its divisors is an integer number (13517364).

Almost surely, 254002057 is an apocalyptic number.

It is an amenable number.

54002057 is a deficient number, since it is larger than the sum of its proper divisors (67399).

54002057 is an equidigital number, since it uses as much as digits as its factorization.

54002057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67398.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 54002057 is about 7348.6091881389. The cubic root of 54002057 is about 377.9811142734.

The spelling of 54002057 in words is "fifty-four million, two thousand, fifty-seven".

Divisors: 1 811 66587 54002057