131631833 has 4 divisors (see below), whose sum is σ = 139374900. Its totient is φ = 123888768.

The previous prime is 131631823. The next prime is 131631847. The reversal of 131631833 is 338136131.

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: 338136131 = 53 ⋅6379927.

It can be written as a sum of positive squares in 2 ways, for example, as 116359369 + 15272464 = 10787^2 + 3908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131631833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131631796 and 131631805.

It is not an unprimeable number, because it can be changed into a prime (131631823) 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, 3871508 + ... + 3871541.

It is an arithmetic number, because the mean of its divisors is an integer number (34843725).

Almost surely, 2^131631833 is an apocalyptic number.

It is an amenable number.

131631833 is a deficient number, since it is larger than the sum of its proper divisors (7743067).

131631833 is an equidigital number, since it uses as much as digits as its factorization.

131631833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743066.

The product of its digits is 3888, while the sum is 29.

The square root of 131631833 is about 11473.0916931749. The cubic root of 131631833 is about 508.6905186352.

Adding to 131631833 its reverse (338136131), we get a palindrome (469767964).

The spelling of 131631833 in words is "one hundred thirty-one million, six hundred thirty-one thousand, eight hundred thirty-three".