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52857143381 = 77551020483
BaseRepresentation
bin110001001110100010…
…000000000001010101
312001102201001002112002
4301032202000001111
51331222412042011
640140544005045
73550564206560
oct611642000125
9161381032462
1052857143381
1120464530179
12a2b1900785
134ca4986903
1427b5d8b4d7
15159561ac3b
hexc4e880055

52857143381 has 4 divisors (see below), whose sum is σ = 60408163872. Its totient is φ = 45306122892.

The previous prime is 52857143377. The next prime is 52857143401. The reversal of 52857143381 is 18334175825.

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.

It is a cyclic number.

It is not a de Polignac number, because 52857143381 - 22 = 52857143377 is a prime.

It is a super-2 number, since 2×528571433812 (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52857143321) 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, 3775510235 + ... + 3775510248.

It is an arithmetic number, because the mean of its divisors is an integer number (15102040968).

Almost surely, 252857143381 is an apocalyptic number.

It is an amenable number.

52857143381 is a deficient number, since it is larger than the sum of its proper divisors (7551020491).

52857143381 is an equidigital number, since it uses as much as digits as its factorization.

52857143381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551020490.

The product of its digits is 806400, while the sum is 47.

The spelling of 52857143381 in words is "fifty-two billion, eight hundred fifty-seven million, one hundred forty-three thousand, three hundred eighty-one".

Divisors: 1 7 7551020483 52857143381