136505631 has 8 divisors (see below), whose sum is σ = 192713904. Its totient is φ = 85650560.

The previous prime is 136505623. The next prime is 136505651.

136505631 is nontrivially palindromic in base 10.

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 136505631 - 2³ = 136505623 is a prime.

It is a super-2 number, since 2×136505631² = 37267574589416322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136505651) 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, 1338240 + ... + 1338341.

It is an arithmetic number, because the mean of its divisors is an integer number (24089238).

Almost surely, 2^136505631 is an apocalyptic number.

136505631 is a deficient number, since it is larger than the sum of its proper divisors (56208273).

136505631 is a wasteful number, since it uses less digits than its factorization.

136505631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676601.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 136505631 is about 11683.5624276160. The cubic root of 136505631 is about 514.8928435112.

The spelling of 136505631 in words is "one hundred thirty-six million, five hundred five thousand, six hundred thirty-one".