131878442 has 16 divisors (see below), whose sum is σ = 201078720. Its totient is φ = 64857312.

The previous prime is 131878441. The next prime is 131878477. The reversal of 131878442 is 244878131.

It is a super-3 number, since 3×131878442³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131878396 and 131878405.

It is not an unprimeable number, because it can be changed into a prime (131878441) 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, 63659 + ... + 65697.

It is an arithmetic number, because the mean of its divisors is an integer number (12567420).

Almost surely, 2^131878442 is an apocalyptic number.

131878442 is a deficient number, since it is larger than the sum of its proper divisors (69200278).

131878442 is a wasteful number, since it uses less digits than its factorization.

131878442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557.

The product of its digits is 43008, while the sum is 38.

The square root of 131878442 is about 11483.8339416764. The cubic root of 131878442 is about 509.0079935135.

The spelling of 131878442 in words is "one hundred thirty-one million, eight hundred seventy-eight thousand, four hundred forty-two".