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61357161 = 364131907
BaseRepresentation
bin1110101000001…
…1110001101001
311021110021012110
43222003301221
5111201412121
610031032533
71343345565
oct352036151
9137407173
1061357161
11316a85a8
121866b749
13c933918
1482126a5
1555bed76
hex3a83c69

61357161 has 8 divisors (see below), whose sum is σ = 81939744. Its totient is φ = 40839680.

The previous prime is 61357159. The next prime is 61357171. The reversal of 61357161 is 16175316.

61357161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61357161 - 21 = 61357159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61357151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14031 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (10242468).

Almost surely, 261357161 is an apocalyptic number.

It is an amenable number.

61357161 is a deficient number, since it is larger than the sum of its proper divisors (20582583).

61357161 is a wasteful number, since it uses less digits than its factorization.

61357161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32551.

The product of its digits is 3780, while the sum is 30.

The square root of 61357161 is about 7833.0811945236. The cubic root of 61357161 is about 394.4165096456.

The spelling of 61357161 in words is "sixty-one million, three hundred fifty-seven thousand, one hundred sixty-one".

Divisors: 1 3 641 1923 31907 95721 20452387 61357161