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11312001 = 332914447
BaseRepresentation
bin101011001001…
…101110000001
3210021201011000
4223021232001
510343441001
61042242213
7165102411
oct53115601
923251130
1011312001
116426968
123956369
132460abc
141706641
15ed6a86
hexac9b81

11312001 has 16 divisors (see below), whose sum is σ = 17337600. Its totient is φ = 7280784.

The previous prime is 11311999. The next prime is 11312009. The reversal of 11312001 is 10021311.

It is not a de Polignac number, because 11312001 - 21 = 11311999 is a prime.

It is a super-2 number, since 2×113120012 = 255922733248002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (11312009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6441 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (1083600).

Almost surely, 211312001 is an apocalyptic number.

It is an amenable number.

11312001 is a deficient number, since it is larger than the sum of its proper divisors (6025599).

11312001 is a wasteful number, since it uses less digits than its factorization.

11312001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485 (or 14479 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 11312001 is about 3363.3318301946. The cubic root of 11312001 is about 224.4811154033.

Adding to 11312001 its reverse (10021311), we get a palindrome (21333312).

The spelling of 11312001 in words is "eleven million, three hundred twelve thousand, one".

Divisors: 1 3 9 27 29 87 261 783 14447 43341 130023 390069 418963 1256889 3770667 11312001