131612801 has 8 divisors (see below), whose sum is σ = 133305480. Its totient is φ = 129927168.

The previous prime is 131612779. The next prime is 131612821. The reversal of 131612801 is 108216131.

It can be written as a sum of positive squares in 4 ways, for example, as 6150400 + 125462401 = 2480^2 + 11201^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131612801 - 2²² = 127418497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131612821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42845 + ... + 45813.

It is an arithmetic number, because the mean of its divisors is an integer number (16663185).

Almost surely, 2^131612801 is an apocalyptic number.

It is an amenable number.

131612801 is a deficient number, since it is larger than the sum of its proper divisors (1692679).

131612801 is an equidigital number, since it uses as much as digits as its factorization.

131612801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 131612801 is about 11472.2622442132. The cubic root of 131612801 is about 508.6660010992. Note that the first 3 decimals are identical.

Adding to 131612801 its reverse (108216131), we get a palindrome (239828932).

The spelling of 131612801 in words is "one hundred thirty-one million, six hundred twelve thousand, eight hundred one".