378553231 has 4 divisors (see below), whose sum is σ = 432632272. Its totient is φ = 324474192.

The previous prime is 378553199. The next prime is 378553261. The reversal of 378553231 is 132355873.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 378553231 - 2⁵ = 378553199 is a prime.

It is a super-2 number, since 2×378553231² = 286605097401078722, 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 (378553261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27039510 + ... + 27039523.

It is an arithmetic number, because the mean of its divisors is an integer number (108158068).

Almost surely, 2^378553231 is an apocalyptic number.

378553231 is a deficient number, since it is larger than the sum of its proper divisors (54079041).

378553231 is an equidigital number, since it uses as much as digits as its factorization.

378553231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54079040.

The product of its digits is 75600, while the sum is 37.

The square root of 378553231 is about 19456.4444593559. Note that the first 4 decimals coincide. The cubic root of 378553231 is about 723.3952494775.

The spelling of 378553231 in words is "three hundred seventy-eight million, five hundred fifty-three thousand, two hundred thirty-one".