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1304402221 = 31191220301
BaseRepresentation
bin100110110111111…
…1001100100101101
310100220110111110101
41031233321210231
510132411332341
6333233511101
744216143633
oct11557714455
93326414411
101304402221
1160a334771
12304a12491
1317a319945
14c5349353
15797ae831
hex4dbf992d

1304402221 has 8 divisors (see below), whose sum is σ = 1353535488. Its totient is φ = 1255710000.

The previous prime is 1304402213. The next prime is 1304402227. The reversal of 1304402221 is 1222044031.

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 1304402221 - 23 = 1304402213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304402227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104230 + ... + 116071.

It is an arithmetic number, because the mean of its divisors is an integer number (169191936).

Almost surely, 21304402221 is an apocalyptic number.

It is an amenable number.

1304402221 is a deficient number, since it is larger than the sum of its proper divisors (49133267).

1304402221 is a wasteful number, since it uses less digits than its factorization.

1304402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220523.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1304402221 is about 36116.5089813509. The cubic root of 1304402221 is about 1092.6234316744.

Adding to 1304402221 its reverse (1222044031), we get a palindrome (2526446252).

The spelling of 1304402221 in words is "one billion, three hundred four million, four hundred two thousand, two hundred twenty-one".

Divisors: 1 31 191 5921 220301 6829331 42077491 1304402221