136378231 has 8 divisors (see below), whose sum is σ = 150094224. Its totient is φ = 122881920.

The previous prime is 136378153. The next prime is 136378279. The reversal of 136378231 is 132873631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136378231 is a prime.

It is a super-2 number, since 2×136378231² = 37198043781378722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136378831) 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, 53616 + ... + 56101.

It is an arithmetic number, because the mean of its divisors is an integer number (18761778).

Almost surely, 2^136378231 is an apocalyptic number.

136378231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136378231 is a deficient number, since it is larger than the sum of its proper divisors (13715993).

136378231 is a wasteful number, since it uses less digits than its factorization.

136378231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109841.

The product of its digits is 18144, while the sum is 34.

The square root of 136378231 is about 11678.1090506982. The cubic root of 136378231 is about 514.7326113762.

The spelling of 136378231 in words is "one hundred thirty-six million, three hundred seventy-eight thousand, two hundred thirty-one".