131234438 has 4 divisors (see below), whose sum is σ = 196851660. Its totient is φ = 65617218.

The previous prime is 131234437. The next prime is 131234443. The reversal of 131234438 is 834432131.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131234438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131234437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808608 + ... + 32808611.

It is an arithmetic number, because the mean of its divisors is an integer number (49212915).

Almost surely, 2^131234438 is an apocalyptic number.

131234438 is a deficient number, since it is larger than the sum of its proper divisors (65617222).

131234438 is an equidigital number, since it uses as much as digits as its factorization.

131234438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65617221.

The product of its digits is 6912, while the sum is 29.

The square root of 131234438 is about 11455.7600358946. The cubic root of 131234438 is about 508.1780923309.

Adding to 131234438 its reverse (834432131), we get a palindrome (965666569).

The spelling of 131234438 in words is "one hundred thirty-one million, two hundred thirty-four thousand, four hundred thirty-eight".