131481378 has 48 divisors (see below), whose sum is σ = 326451840. Its totient is φ = 37464768.

The previous prime is 131481367. The next prime is 131481397. The reversal of 131481378 is 873184131.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54126 + ... + 56502.

It is an arithmetic number, because the mean of its divisors is an integer number (6801080).

Almost surely, 2^131481378 is an apocalyptic number.

131481378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131481378 is an abundant number, since it is smaller than the sum of its proper divisors (194970462).

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

131481378 is a wasteful number, since it uses less digits than its factorization.

131481378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831 (or 2828 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 131481378 is about 11466.5329546468. The cubic root of 131481378 is about 508.4966338973.

The spelling of 131481378 in words is "one hundred thirty-one million, four hundred eighty-one thousand, three hundred seventy-eight".