381632557 has 4 divisors (see below), whose sum is σ = 381730816. Its totient is φ = 381534300.

The previous prime is 381632549. The next prime is 381632561. The reversal of 381632557 is 755236183.

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 381632557 - 2³ = 381632549 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 (381612557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43053 + ... + 51154.

It is an arithmetic number, because the mean of its divisors is an integer number (95432704).

Almost surely, 2^381632557 is an apocalyptic number.

It is an amenable number.

381632557 is a deficient number, since it is larger than the sum of its proper divisors (98259).

381632557 is an equidigital number, since it uses as much as digits as its factorization.

381632557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98258.

The product of its digits is 151200, while the sum is 40.

The square root of 381632557 is about 19535.4180144680. The cubic root of 381632557 is about 725.3514313661.

The spelling of 381632557 in words is "three hundred eighty-one million, six hundred thirty-two thousand, five hundred fifty-seven".