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80003021 = 726942487
BaseRepresentation
bin1001100010010…
…11111111001101
312120112120111212
410301023333031
5130440044041
611534424205
71661004650
oct461137715
9176476455
1080003021
11411834aa
1222962065
1313761887
14a8a7897
1570548eb
hex4c4bfcd

80003021 has 8 divisors (see below), whose sum is σ = 91774080. Its totient is φ = 68317488.

The previous prime is 80002999. The next prime is 80003029. The reversal of 80003021 is 12030008.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-80003021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80002987 and 80003005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80003029) 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, 19361 + ... + 23126.

It is an arithmetic number, because the mean of its divisors is an integer number (11471760).

Almost surely, 280003021 is an apocalyptic number.

It is an amenable number.

80003021 is a deficient number, since it is larger than the sum of its proper divisors (11771059).

80003021 is a wasteful number, since it uses less digits than its factorization.

80003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42763.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 80003021 is about 8944.4407874389. The cubic root of 80003021 is about 430.8923617274.

Adding to 80003021 its reverse (12030008), we get a palindrome (92033029).

The spelling of 80003021 in words is "eighty million, three thousand, twenty-one".

Divisors: 1 7 269 1883 42487 297409 11429003 80003021