381400553 has 4 divisors (see below), whose sum is σ = 381465168. Its totient is φ = 381335940.

The previous prime is 381400531. The next prime is 381400577. The reversal of 381400553 is 355004183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381400553 - 2⁸ = 381400297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (381420553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22451 + ... + 35592.

It is an arithmetic number, because the mean of its divisors is an integer number (95366292).

Almost surely, 2^381400553 is an apocalyptic number.

It is an amenable number.

381400553 is a deficient number, since it is larger than the sum of its proper divisors (64615).

381400553 is an equidigital number, since it uses as much as digits as its factorization.

381400553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64614.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 381400553 is about 19529.4790765140. The cubic root of 381400553 is about 725.2044151299.

The spelling of 381400553 in words is "three hundred eighty-one million, four hundred thousand, five hundred fifty-three".