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57198253 = 78991811
BaseRepresentation
bin1101101000110…
…0011010101101
310222121222020211
43122030122231
5104120321003
65401542421
71263114520
oct332143255
9128558224
1057198253
112a317992
12171a4a11
13bb08928
14784cbb7
15504c96d
hex368c6ad

57198253 has 8 divisors (see below), whose sum is σ = 66104640. Its totient is φ = 48475680.

The previous prime is 57198247. The next prime is 57198259. The reversal of 57198253 is 35289175.

It is an interprime number because it is at equal distance from previous prime (57198247) and next prime (57198259).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57198253 - 25 = 57198221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57198259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45283 + ... + 46528.

It is an arithmetic number, because the mean of its divisors is an integer number (8263080).

Almost surely, 257198253 is an apocalyptic number.

It is an amenable number.

57198253 is a deficient number, since it is larger than the sum of its proper divisors (8906387).

57198253 is an equidigital number, since it uses as much as digits as its factorization.

57198253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91907.

The product of its digits is 75600, while the sum is 40.

The square root of 57198253 is about 7562.9526641385. The cubic root of 57198253 is about 385.2957821477.

The spelling of 57198253 in words is "fifty-seven million, one hundred ninety-eight thousand, two hundred fifty-three".

Divisors: 1 7 89 623 91811 642677 8171179 57198253