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131122431231 = 3113973407007
BaseRepresentation
bin111101000011110000…
…0011000010011111111
3110112110010222122210220
41322013200120103333
54122014320244411
6140123052432423
712321223163421
oct1720740302377
9415403878726
10131122431231
1150677215350
12214b4778713
13c4985aa41c
1464bc5a6811
15362667ab06
hex1e878184ff

131122431231 has 8 divisors (see below), whose sum is σ = 190723536384. Its totient is φ = 79468140120.

The previous prime is 131122431227. The next prime is 131122431287. The reversal of 131122431231 is 132134221131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131122431231 - 22 = 131122431227 is a prime.

It is a super-2 number, since 2×1311224312312 (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122431211) 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, 1986703471 + ... + 1986703536.

It is an arithmetic number, because the mean of its divisors is an integer number (23840442048).

Almost surely, 2131122431231 is an apocalyptic number.

131122431231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131122431231 is a deficient number, since it is larger than the sum of its proper divisors (59601105153).

131122431231 is a wasteful number, since it uses less digits than its factorization.

131122431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973407021.

The product of its digits is 864, while the sum is 24.

Adding to 131122431231 its reverse (132134221131), we get a palindrome (263256652362).

The spelling of 131122431231 in words is "one hundred thirty-one billion, one hundred twenty-two million, four hundred thirty-one thousand, two hundred thirty-one".

Divisors: 1 3 11 33 3973407007 11920221021 43707477077 131122431231