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3131010001 = 7447287143
BaseRepresentation
bin1011101010011111…
…0110101111010001
322002012112210021101
42322213312233101
522403014310001
61234404224401
7140406101020
oct27247665721
98065483241
103131010001
111367412179
1273469b101
133ab894952
14219b8a8b7
15134d21a01
hexba9f6bd1

3131010001 has 4 divisors (see below), whose sum is σ = 3578297152. Its totient is φ = 2683722852.

The previous prime is 3131009983. The next prime is 3131010089. The reversal of 3131010001 is 1000101313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3131010001 - 27 = 3131009873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131010001.

It is not an unprimeable number, because it can be changed into a prime (3131020001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223643565 + ... + 223643578.

It is an arithmetic number, because the mean of its divisors is an integer number (894574288).

Almost surely, 23131010001 is an apocalyptic number.

It is an amenable number.

3131010001 is a deficient number, since it is larger than the sum of its proper divisors (447287151).

3131010001 is an equidigital number, since it uses as much as digits as its factorization.

3131010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447287150.

The product of its (nonzero) digits is 9, while the sum is 10.

The square root of 3131010001 is about 55955.4286999930. The cubic root of 3131010001 is about 1462.9455142190.

Adding to 3131010001 its reverse (1000101313), we get a palindrome (4131111314).

The spelling of 3131010001 in words is "three billion, one hundred thirty-one million, ten thousand, one".

Divisors: 1 7 447287143 3131010001