131239154 has 4 divisors (see below), whose sum is σ = 196858734. Its totient is φ = 65619576.

The previous prime is 131239153. The next prime is 131239159. The reversal of 131239154 is 451932131.

131239154 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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., 121771225 + 9467929 = 11035^2 + 3077^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131239153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32809787 + ... + 32809790.

Almost surely, 2^131239154 is an apocalyptic number.

131239154 is a deficient number, since it is larger than the sum of its proper divisors (65619580).

131239154 is an equidigital number, since it uses as much as digits as its factorization.

131239154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65619579.

The product of its digits is 3240, while the sum is 29.

The square root of 131239154 is about 11455.9658693626. The cubic root of 131239154 is about 508.1841795013.

The spelling of 131239154 in words is "one hundred thirty-one million, two hundred thirty-nine thousand, one hundred fifty-four".