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57550215387 = 378333017909
BaseRepresentation
bin110101100110010000…
…101001100011011011
312111112202212212000210
4311212100221203123
51420330323343022
642234352502203
74105101521340
oct654620514333
9174482785023
1057550215387
1122452661685
12b1a154a963
1355720601b2
142add3947c7
15176c645a0c
hexd664298db

57550215387 has 16 divisors (see below), whose sum is σ = 88752142080. Its totient is φ = 32489621472.

The previous prime is 57550215377. The next prime is 57550215451. The reversal of 57550215387 is 78351205575.

57550215387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57550215387 - 27 = 57550215259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57550215347) 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, 16507212 + ... + 16510697.

It is an arithmetic number, because the mean of its divisors is an integer number (5547008880).

Almost surely, 257550215387 is an apocalyptic number.

57550215387 is a deficient number, since it is larger than the sum of its proper divisors (31201926693).

57550215387 is a wasteful number, since it uses less digits than its factorization.

57550215387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33018002.

The product of its (nonzero) digits is 1470000, while the sum is 48.

The spelling of 57550215387 in words is "fifty-seven billion, five hundred fifty million, two hundred fifteen thousand, three hundred eighty-seven".

Divisors: 1 3 7 21 83 249 581 1743 33017909 99053727 231125363 693376089 2740486447 8221459341 19183405129 57550215387