136431553 has 8 divisors (see below), whose sum is σ = 139523328. Its totient is φ = 133347744.

The previous prime is 136431521. The next prime is 136431569. The reversal of 136431553 is 355134631.

It is the 4769-th star 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 136431553 - 2⁵ = 136431521 is a prime.

It is a super-2 number, since 2×136431553² = 37227137307983618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136431583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44725 + ... + 47677.

It is an arithmetic number, because the mean of its divisors is an integer number (17440416).

Almost surely, 2^136431553 is an apocalyptic number.

It is an amenable number.

136431553 is a deficient number, since it is larger than the sum of its proper divisors (3091775).

136431553 is an equidigital number, since it uses as much as digits as its factorization.

136431553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983.

The product of its digits is 16200, while the sum is 31.

The square root of 136431553 is about 11680.3918170582. The cubic root of 136431553 is about 514.7996870764.

The spelling of 136431553 in words is "one hundred thirty-six million, four hundred thirty-one thousand, five hundred fifty-three".