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1221074418 = 23203512403
BaseRepresentation
bin100100011001000…
…0001110111110010
310011002200000012110
41020302001313302
510000043340133
6321055510150
742154650504
oct11062016762
93132600173
101221074418
115772a0313
122a0b28356
13165c92955
14b8257d74
15722eec63
hex48c81df2

1221074418 has 8 divisors (see below), whose sum is σ = 2442148848. Its totient is φ = 407024804.

The previous prime is 1221074417. The next prime is 1221074489. The reversal of 1221074418 is 8144701221.

Adding to 1221074418 its reverse (8144701221), we get a palindrome (9365775639).

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

1221074418 is an admirable number.

It is a super-3 number, since 3×12210744183 (a number of 28 digits) contains 333 as substring.

It is a Leyland number of the form 135 + 513.

It is not an unprimeable number, because it can be changed into a prime (1221074411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101756196 + ... + 101756207.

It is an arithmetic number, because the mean of its divisors is an integer number (305268606).

Almost surely, 21221074418 is an apocalyptic number.

1221074418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221074418 is a wasteful number, since it uses less digits than its factorization.

1221074418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203512408.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1221074418 is about 34943.8752573323. The cubic root of 1221074418 is about 1068.8433123137.

The spelling of 1221074418 in words is "one billion, two hundred twenty-one million, seventy-four thousand, four hundred eighteen".

Divisors: 1 2 3 6 203512403 407024806 610537209 1221074418