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2001312001 = 13211729607
BaseRepresentation
bin111011101001001…
…1001100100000001
312011110211011221201
41313102121210001
513044313441001
6530331021201
7100410604603
oct16722314401
95143734851
102001312001
11937763367
1247a29a801
1325b8165b0
1414db1b173
15baa71501
hex77499901

2001312001 has 8 divisors (see below), whose sum is σ = 2165476544. Its totient is φ = 1838607120.

The previous prime is 2001311993. The next prime is 2001312017. The reversal of 2001312001 is 1002131002.

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 2001312001 - 23 = 2001311993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001312031) 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, 362061 + ... + 367546.

It is an arithmetic number, because the mean of its divisors is an integer number (270684568).

Almost surely, 22001312001 is an apocalyptic number.

It is an amenable number.

2001312001 is a deficient number, since it is larger than the sum of its proper divisors (164164543).

2001312001 is a wasteful number, since it uses less digits than its factorization.

2001312001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729831.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2001312001 is about 44736.0257622422. The cubic root of 2001312001 is about 1260.1964926197.

Adding to 2001312001 its reverse (1002131002), we get a palindrome (3003443003).

The spelling of 2001312001 in words is "two billion, one million, three hundred twelve thousand, one".

Divisors: 1 13 211 2743 729607 9484891 153947077 2001312001