131631401 has 8 divisors (see below), whose sum is σ = 144201600. Its totient is φ = 119161840.

The previous prime is 131631389. The next prime is 131631403. The reversal of 131631401 is 104136131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131631401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131631403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22406 + ... + 27663.

It is an arithmetic number, because the mean of its divisors is an integer number (18025200).

Almost surely, 2^131631401 is an apocalyptic number.

131631401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131631401 is a deficient number, since it is larger than the sum of its proper divisors (12570199).

131631401 is a wasteful number, since it uses less digits than its factorization.

131631401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50319.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 131631401 is about 11473.0728664992. The cubic root of 131631401 is about 508.6899621473.

Adding to 131631401 its reverse (104136131), we get a palindrome (235767532).

The spelling of 131631401 in words is "one hundred thirty-one million, six hundred thirty-one thousand, four hundred one".