136551631 has 2 divisors, whose sum is σ = 136551632. Its totient is φ = 136551630.

The previous prime is 136551629. The next prime is 136551637. The reversal of 136551631 is 136155631.

136551631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136551631 - 2¹ = 136551629 is a prime.

It is a super-2 number, since 2×136551631² = 37292695857520322, which contains 22 as substring.

Together with 136551629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 136551593 and 136551602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136551637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68275815 + 68275816.

It is an arithmetic number, because the mean of its divisors is an integer number (68275816).

Almost surely, 2^136551631 is an apocalyptic number.

136551631 is a deficient number, since it is larger than the sum of its proper divisors (1).

136551631 is an equidigital number, since it uses as much as digits as its factorization.

136551631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 31.

The square root of 136551631 is about 11685.5308394613. The cubic root of 136551631 is about 514.9506736306.

The spelling of 136551631 in words is "one hundred thirty-six million, five hundred fifty-one thousand, six hundred thirty-one".