Search a number
-
+
54278838281 = 618323094643
BaseRepresentation
bin110010100011010001…
…010101100000001001
312012002210012200021202
4302203101111200021
51342130340311111
640534011513545
73631036340633
oct624321254011
9165083180252
1054278838281
1121023a97638
12a629a588b5
1351703900b5
1428acb09a53
15162a348b3b
hexca3455809

54278838281 has 16 divisors (see below), whose sum is σ = 55869549120. Its totient is φ = 52711581120.

The previous prime is 54278838241. The next prime is 54278838301. The reversal of 54278838281 is 18283887245.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-54278838281 is a prime.

It is a super-2 number, since 2×542788382812 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54278838241) 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, 11688146 + ... + 11692788.

It is an arithmetic number, because the mean of its divisors is an integer number (3491846820).

Almost surely, 254278838281 is an apocalyptic number.

It is an amenable number.

54278838281 is a deficient number, since it is larger than the sum of its proper divisors (1590710839).

54278838281 is a wasteful number, since it uses less digits than its factorization.

54278838281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096.

The product of its digits is 6881280, while the sum is 56.

The spelling of 54278838281 in words is "fifty-four billion, two hundred seventy-eight million, eight hundred thirty-eight thousand, two hundred eighty-one".

Divisors: 1 61 83 2309 4643 5063 140849 191647 283223 385369 10720687 11690467 23507509 653961907 889817021 54278838281