136397551 has 8 divisors (see below), whose sum is σ = 141051008. Its totient is φ = 131760000.

The previous prime is 136397543. The next prime is 136397581. The reversal of 136397551 is 155793631.

It is a happy number.

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 136397551 - 2³ = 136397543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136397581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14971 + ... + 22291.

It is an arithmetic number, because the mean of its divisors is an integer number (17631376).

Almost surely, 2^136397551 is an apocalyptic number.

136397551 is a deficient number, since it is larger than the sum of its proper divisors (4653457).

136397551 is an equidigital number, since it uses as much as digits as its factorization.

136397551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7953.

The product of its digits is 85050, while the sum is 40.

The square root of 136397551 is about 11678.9362101178. The cubic root of 136397551 is about 514.7569167325.

The spelling of 136397551 in words is "one hundred thirty-six million, three hundred ninety-seven thousand, five hundred fifty-one".