Search a number
31900111110011 = 130124519685711
BaseRepresentation
bin1110100000011010100101…
…10010100111111101111011
311011221121202120222020111002
413100031102302213331323
513140122411421010021
6151502413030355215
76501464330342534
oct720152262477573
9134847676866432
1031900111110011
11a1898410a63a1
1236b25567bbb0b
1314a52241c7551
147c3d8b85d68b
153a4bdd6b850b
hex1d0352ca7f7b

31900111110011 has 4 divisors (see below), whose sum is σ = 31924630797024. Its totient is φ = 31875591423000.

The previous prime is 31900111110001. The next prime is 31900111110041. The reversal of 31900111110011 is 11001111100913.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-31900111110011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31900111110001) 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, 12259841555 + ... + 12259844156.

It is an arithmetic number, because the mean of its divisors is an integer number (7981157699256).

Almost surely, 231900111110011 is an apocalyptic number.

31900111110011 is a deficient number, since it is larger than the sum of its proper divisors (24519687013).

31900111110011 is a wasteful number, since it uses less digits than its factorization.

31900111110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24519687012.

The product of its (nonzero) digits is 27, while the sum is 20.

Adding to 31900111110011 its reverse (11001111100913), we get a palindrome (42901222210924).

The spelling of 31900111110011 in words is "thirty-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, eleven".

Divisors: 1 1301 24519685711 31900111110011