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32001109981 is a prime number
BaseRepresentation
bin11101110011011010…
…100010111111011101
310001121012201211012121
4131303122202333131
51011014241004411
622411234502541
72212005642511
oct356332427735
9101535654177
1032001109981
1112631879635
126251134a51
13302cb3a749
141798112141
15c7465a571
hex7736a2fdd

32001109981 has 2 divisors, whose sum is σ = 32001109982. Its totient is φ = 32001109980.

The previous prime is 32001109967. The next prime is 32001110003. The reversal of 32001109981 is 18990110023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16248600900 + 15752509081 = 127470^2 + 125509^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001109981 - 213 = 32001101789 is a prime.

It is a super-2 number, since 2×320011099812 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32001109951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16000554990 + 16000554991.

It is an arithmetic number, because the mean of its divisors is an integer number (16000554991).

Almost surely, 232001109981 is an apocalyptic number.

It is an amenable number.

32001109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32001109981 is an equidigital number, since it uses as much as digits as its factorization.

32001109981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 32001109981 in words is "thirty-two billion, one million, one hundred nine thousand, nine hundred eighty-one".