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57491071 = 115226461
BaseRepresentation
bin1101101101001…
…1111001111111
311000011211220221
43123103321333
5104204203241
65412122211
71265444311
oct333237177
9130154827
1057491071
112a4a7990
1217306367
13bbabcb1
1478c77b1
1550a95d1
hex36d3e7f

57491071 has 4 divisors (see below), whose sum is σ = 62717544. Its totient is φ = 52264600.

The previous prime is 57491023. The next prime is 57491117. The reversal of 57491071 is 17019475.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57491071 - 27 = 57490943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57491171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2613220 + ... + 2613241.

It is an arithmetic number, because the mean of its divisors is an integer number (15679386).

Almost surely, 257491071 is an apocalyptic number.

57491071 is a deficient number, since it is larger than the sum of its proper divisors (5226473).

57491071 is a wasteful number, since it uses less digits than its factorization.

57491071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5226472.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 57491071 is about 7582.2866603684. The cubic root of 57491071 is about 385.9521516213.

The spelling of 57491071 in words is "fifty-seven million, four hundred ninety-one thousand, seventy-one".

Divisors: 1 11 5226461 57491071