131242355 has 4 divisors (see below), whose sum is σ = 157490832. Its totient is φ = 104993880.

The previous prime is 131242351. The next prime is 131242357. The reversal of 131242355 is 553242131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553242131 = 13 ⋅42557087.

It is not a de Polignac number, because 131242355 - 2² = 131242351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131242351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13124231 + ... + 13124240.

It is an arithmetic number, because the mean of its divisors is an integer number (39372708).

Almost surely, 2^131242355 is an apocalyptic number.

131242355 is a deficient number, since it is larger than the sum of its proper divisors (26248477).

131242355 is an equidigital number, since it uses as much as digits as its factorization.

131242355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26248476.

The product of its digits is 3600, while the sum is 26.

The square root of 131242355 is about 11456.1055773766. The cubic root of 131242355 is about 508.1883111045.

Adding to 131242355 its reverse (553242131), we get a palindrome (684484486).

The spelling of 131242355 in words is "one hundred thirty-one million, two hundred forty-two thousand, three hundred fifty-five".