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1220000213 = 5099472531
BaseRepresentation
bin100100010110111…
…1011100111010101
310011000122102200002
41020231323213111
54444310001323
6321020501045
742142554635
oct11055734725
93130572602
101220000213
11576727243
122a06aa785
131659a7a23
14b80586c5
157218b828
hex48b7b9d5

1220000213 has 8 divisors (see below), whose sum is σ = 1224171360. Its totient is φ = 1215837040.

The previous prime is 1220000191. The next prime is 1220000231. The reversal of 1220000213 is 3120000221.

It is a happy number.

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 1220000213 - 214 = 1219983829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220000194 and 1220000203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220000233) 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, 480758 + ... + 483288.

It is an arithmetic number, because the mean of its divisors is an integer number (153021420).

Almost surely, 21220000213 is an apocalyptic number.

It is an amenable number.

1220000213 is a deficient number, since it is larger than the sum of its proper divisors (4171147).

1220000213 is an equidigital number, since it uses as much as digits as its factorization.

1220000213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1220000213 is about 34928.5014422320. The cubic root of 1220000213 is about 1068.5297923338.

Adding to 1220000213 its reverse (3120000221), we get a palindrome (4340000434).

The spelling of 1220000213 in words is "one billion, two hundred twenty million, two hundred thirteen", and thus it is an aban number.

Divisors: 1 509 947 2531 482023 1288279 2396857 1220000213