131618042 has 4 divisors (see below), whose sum is σ = 197427066. Its totient is φ = 65809020.

The previous prime is 131618041. The next prime is 131618057. The reversal of 131618042 is 240816131.

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

It can be written as a sum of positive squares in only one way, i.e., 115369081 + 16248961 = 10741^2 + 4031^2 .

It is not an unprimeable number, because it can be changed into a prime (131618041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32904509 + ... + 32904512.

Almost surely, 2^131618042 is an apocalyptic number.

131618042 is a deficient number, since it is larger than the sum of its proper divisors (65809024).

131618042 is an equidigital number, since it uses as much as digits as its factorization.

131618042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65809023.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 131618042 is about 11472.4906624499. The cubic root of 131618042 is about 508.6727529327.

The spelling of 131618042 in words is "one hundred thirty-one million, six hundred eighteen thousand, forty-two".