133631563 has 8 divisors (see below), whose sum is σ = 144775008. Its totient is φ = 122611584.

The previous prime is 133631557. The next prime is 133631569. The reversal of 133631563 is 365136331.

It is an interprime number because it is at equal distance from previous prime (133631557) and next prime (133631569).

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 133631563 - 2¹⁷ = 133500491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133631569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28606 + ... + 32947.

It is an arithmetic number, because the mean of its divisors is an integer number (18096876).

Almost surely, 2^133631563 is an apocalyptic number.

133631563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133631563 is a deficient number, since it is larger than the sum of its proper divisors (11143445).

133631563 is a wasteful number, since it uses less digits than its factorization.

133631563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61733.

The product of its digits is 14580, while the sum is 31.

The square root of 133631563 is about 11559.9118941279. The cubic root of 133631563 is about 511.2535649746.

Adding to 133631563 its reverse (365136331), we get a palindrome (498767894).

The spelling of 133631563 in words is "one hundred thirty-three million, six hundred thirty-one thousand, five hundred sixty-three".