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103831406511 = 3719260229089
BaseRepresentation
bin110000010110011010…
…1011000011110101111
3100221000012002221220120
41200230311120132233
53200121320002021
6115411031220023
710334016251610
oct1405465303657
9327005087816
10103831406511
1140042138568
1218158b17613
139a395220a1
14504dc49c07
152a7a7ab2c6
hex182cd587af

103831406511 has 16 divisors (see below), whose sum is σ = 166546617600. Its totient is φ = 56209483008.

The previous prime is 103831406509. The next prime is 103831406521. The reversal of 103831406511 is 115604138301.

It is not a de Polignac number, because 103831406511 - 21 = 103831406509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103831406521) 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, 130114146 + ... + 130114943.

It is an arithmetic number, because the mean of its divisors is an integer number (10409163600).

Almost surely, 2103831406511 is an apocalyptic number.

103831406511 is a deficient number, since it is larger than the sum of its proper divisors (62715211089).

103831406511 is a wasteful number, since it uses less digits than its factorization.

103831406511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260229118.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 103831406511 in words is "one hundred three billion, eight hundred thirty-one million, four hundred six thousand, five hundred eleven".

Divisors: 1 3 7 19 21 57 133 399 260229089 780687267 1821603623 4944352691 5464810869 14833058073 34610468837 103831406511