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64031 = 115821
BaseRepresentation
bin1111101000011111
310020211112
433220133
54022111
61212235
7354452
oct175037
9106745
1064031
1144120
123107b
13231b6
1419499
1513e8b
hexfa1f

64031 has 4 divisors (see below), whose sum is σ = 69864. Its totient is φ = 58200.

The previous prime is 64019. The next prime is 64033. The reversal of 64031 is 13046.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-64031 is a prime.

It is a super-2 number, since 2×640312 = 8199937922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63997 and 64015.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 64031.

It is not an unprimeable number, because it can be changed into a prime (64033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900 + ... + 2921.

It is an arithmetic number, because the mean of its divisors is an integer number (17466).

264031 is an apocalyptic number.

64031 is a deficient number, since it is larger than the sum of its proper divisors (5833).

64031 is a wasteful number, since it uses less digits than its factorization.

64031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 64031 is about 253.0434745256. The cubic root of 64031 is about 40.0064572909.

Adding to 64031 its reverse (13046), we get a palindrome (77077).

The spelling of 64031 in words is "sixty-four thousand, thirty-one".

Divisors: 1 11 5821 64031