131434218 has 16 divisors (see below), whose sum is σ = 292076160. Its totient is φ = 43811388.

The previous prime is 131434217. The next prime is 131434243. The reversal of 131434218 is 812434131.

131434218 is a `hidden beast` number, since 1 + 314 + 342 + 1 + 8 = 666.

It is a super-2 number, since 2×131434218² = 34549907322543048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 131434191 and 131434200.

It is not an unprimeable number, because it can be changed into a prime (131434217) 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, 1216930 + ... + 1217037.

It is an arithmetic number, because the mean of its divisors is an integer number (18254760).

Almost surely, 2^131434218 is an apocalyptic number.

131434218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131434218 is an abundant number, since it is smaller than the sum of its proper divisors (160641942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131434218 is a wasteful number, since it uses less digits than its factorization.

131434218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433978 (or 2433972 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 131434218 is about 11464.4763508849. The cubic root of 131434218 is about 508.4358304351.

Adding to 131434218 its reverse (812434131), we get a palindrome (943868349).

The spelling of 131434218 in words is "one hundred thirty-one million, four hundred thirty-four thousand, two hundred eighteen".