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51617197 is a prime number
BaseRepresentation
bin1100010011100…
…1110110101101
310121010102111001
43010321312231
5101203222242
65042200301
71164511312
oct304716655
9117112431
1051617197
1127155845
1215353091
13a903528
146bd8d09
1547e8eb7
hex3139dad

51617197 has 2 divisors, whose sum is σ = 51617198. Its totient is φ = 51617196.

The previous prime is 51617179. The next prime is 51617227. The reversal of 51617197 is 79171615.

Together with previous prime (51617179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47692836 + 3924361 = 6906^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 51617197 - 211 = 51615149 is a prime.

It is a super-2 number, since 2×516171972 = 5328670052273618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51617107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25808598 + 25808599.

It is an arithmetic number, because the mean of its divisors is an integer number (25808599).

Almost surely, 251617197 is an apocalyptic number.

It is an amenable number.

51617197 is a deficient number, since it is larger than the sum of its proper divisors (1).

51617197 is an equidigital number, since it uses as much as digits as its factorization.

51617197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 37.

The square root of 51617197 is about 7184.5109088928. The cubic root of 51617197 is about 372.3329509371.

The spelling of 51617197 in words is "fifty-one million, six hundred seventeen thousand, one hundred ninety-seven".