136421511 has 16 divisors (see below), whose sum is σ = 185760000. Its totient is φ = 89028608.

The previous prime is 136421497. The next prime is 136421521. The reversal of 136421511 is 115124631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 136421511 - 2¹⁵ = 136388743 is a prime.

It is a super-2 number, since 2×136421511² = 37221657327046242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136421521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43990 + ... + 46988.

It is an arithmetic number, because the mean of its divisors is an integer number (11610000).

Almost surely, 2^136421511 is an apocalyptic number.

136421511 is a deficient number, since it is larger than the sum of its proper divisors (49338489).

136421511 is a wasteful number, since it uses less digits than its factorization.

136421511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318.

The product of its digits is 720, while the sum is 24.

The square root of 136421511 is about 11679.9619434312. The cubic root of 136421511 is about 514.7870562121.

The spelling of 136421511 in words is "one hundred thirty-six million, four hundred twenty-one thousand, five hundred eleven".