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1220050513 = 115312911621
BaseRepresentation
bin100100010111000…
…0111111001010001
310011000201222200001
41020232013321101
54444313104023
6321021530001
742143154403
oct11056077121
93130658601
101220050513
11576761010
122a0713901
131659c48a6
14b806cb73
157219b6ad
hex48b87e51

1220050513 has 16 divisors (see below), whose sum is σ = 1357964352. Its totient is φ = 1086696000.

The previous prime is 1220050511. The next prime is 1220050541. The reversal of 1220050513 is 3150500221.

It is a cyclic number.

It is not a de Polignac number, because 1220050513 - 21 = 1220050511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220050511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751843 + ... + 753463.

It is an arithmetic number, because the mean of its divisors is an integer number (84872772).

Almost surely, 21220050513 is an apocalyptic number.

It is an amenable number.

1220050513 is a deficient number, since it is larger than the sum of its proper divisors (137913839).

1220050513 is a wasteful number, since it uses less digits than its factorization.

1220050513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1220050513 is about 34929.2214771529. The cubic root of 1220050513 is about 1068.5444771154.

Adding to 1220050513 its reverse (3150500221), we get a palindrome (4370550734).

The spelling of 1220050513 in words is "one billion, two hundred twenty million, fifty thousand, five hundred thirteen".

Divisors: 1 11 53 583 1291 1621 14201 17831 68423 85913 752653 945043 2092711 23019821 110913683 1220050513