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65130457 = 722357791
BaseRepresentation
bin1111100001110…
…0111111011001
311112112222012011
43320130333121
5113133133312
610243545521
71420412500
oct370347731
9145488164
1065130457
1133845527
121998b2a1
1310655242
148915837
155ab7da7
hex3e1cfd9

65130457 has 12 divisors (see below), whose sum is σ = 79059456. Its totient is φ = 53397960.

The previous prime is 65130431. The next prime is 65130463. The reversal of 65130457 is 75403156.

It is a de Polignac number, because none of the positive numbers 2k-65130457 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65130407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27769 + ... + 30022.

It is an arithmetic number, because the mean of its divisors is an integer number (6588288).

Almost surely, 265130457 is an apocalyptic number.

It is an amenable number.

65130457 is a deficient number, since it is larger than the sum of its proper divisors (13928999).

65130457 is a wasteful number, since it uses less digits than its factorization.

65130457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57828 (or 57821 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 65130457 is about 8070.3442925318. The cubic root of 65130457 is about 402.3413867788.

The spelling of 65130457 in words is "sixty-five million, one hundred thirty thousand, four hundred fifty-seven".

Divisors: 1 7 23 49 161 1127 57791 404537 1329193 2831759 9304351 65130457