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9981512 = 2311172
BaseRepresentation
bin100110000100…
…111001001000
3200210010001122
4212010321020
510023402022
6553534412
7150561422
oct46047110
920703048
109981512
1156a8292
123414408
1320b6328
14147b812
15d22742
hex984e48

9981512 has 12 divisors (see below), whose sum is σ = 18732105. Its totient is φ = 4986288.

The previous prime is 9981467. The next prime is 9981551. The reversal of 9981512 is 2151899.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 7043716 + 2937796 = 2654^2 + 1714^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=2234.

It is a super-2 number, since 2×99815122 = 199261163612288, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8378 + ... + 9494.

Almost surely, 29981512 is an apocalyptic number.

It is an amenable number.

9981512 is a deficient number, since it is larger than the sum of its proper divisors (8750593).

9981512 is an equidigital number, since it uses as much as digits as its factorization.

9981512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240 (or 1119 counting only the distinct ones).

The product of its digits is 6480, while the sum is 35.

The square root of 9981512 is about 3159.3530983415. The cubic root of 9981512 is about 215.3106164684.

The spelling of 9981512 in words is "nine million, nine hundred eighty-one thousand, five hundred twelve".

Divisors: 1 2 4 8 1117 2234 4468 8936 1247689 2495378 4990756 9981512