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221013031 = 2911636553
BaseRepresentation
bin11010010110001…
…10010000100111
3120101212121212211
431023012100213
5423034404111
633533024251
75322402601
oct1513062047
9511777784
10221013031
111038353a8
1262025087
1336a33855
14214d2171
151460a521
hexd2c6427

221013031 has 8 divisors (see below), whose sum is σ = 228865680. Its totient is φ = 213175872.

The previous prime is 221013029. The next prime is 221013047. The reversal of 221013031 is 130310122.

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 221013031 - 21 = 221013029 is a prime.

It is a super-2 number, since 2×2210130312 = 97693519743613922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013011) 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, 30451 + ... + 37003.

It is an arithmetic number, because the mean of its divisors is an integer number (28608210).

Almost surely, 2221013031 is an apocalyptic number.

221013031 is a deficient number, since it is larger than the sum of its proper divisors (7852649).

221013031 is a wasteful number, since it uses less digits than its factorization.

221013031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 221013031 is about 14866.5070208170. The cubic root of 221013031 is about 604.6062424282.

Adding to 221013031 its reverse (130310122), we get a palindrome (351323153).

The spelling of 221013031 in words is "two hundred twenty-one million, thirteen thousand, thirty-one".

Divisors: 1 29 1163 6553 33727 190037 7621139 221013031