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63161213 = 532814241
BaseRepresentation
bin1111000011110…
…0001101111101
311101211220220012
43300330031331
5112132124323
610133433005
71364601323
oct360741575
9141756805
1063161213
113271aa55
121919b765
1310115acb
148561d13
155829678
hex3c3c37d

63161213 has 8 divisors (see below), whose sum is σ = 64597176. Its totient is φ = 61734400.

The previous prime is 63161201. The next prime is 63161221. The reversal of 63161213 is 31216136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40475044 + 22686169 = 6362^2 + 4763^2 .

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

It is not a de Polignac number, because 63161213 - 28 = 63160957 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 (63161113) 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, 12773 + ... + 17013.

It is an arithmetic number, because the mean of its divisors is an integer number (8074647).

Almost surely, 263161213 is an apocalyptic number.

It is an amenable number.

63161213 is a deficient number, since it is larger than the sum of its proper divisors (1435963).

63161213 is a wasteful number, since it uses less digits than its factorization.

63161213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4575.

The product of its digits is 648, while the sum is 23.

The square root of 63161213 is about 7947.4029091270. The cubic root of 63161213 is about 398.2448368536.

Adding to 63161213 its reverse (31216136), we get a palindrome (94377349).

The spelling of 63161213 in words is "sixty-three million, one hundred sixty-one thousand, two hundred thirteen".

Divisors: 1 53 281 4241 14893 224773 1191721 63161213