381451731 has 8 divisors (see below), whose sum is σ = 508958160. Its totient is φ = 254123232.

The previous prime is 381451717. The next prime is 381451747. The reversal of 381451731 is 137154183.

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

It is not a de Polignac number, because 381451731 - 2⁵ = 381451699 is a prime.

It is a super-2 number, since 2×381451731² = 291010846165792722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381451692 and 381451701.

It is not an unprimeable number, because it can be changed into a prime (381455731) 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 7 ways as a sum of consecutive naturals, for example, 39396 + ... + 48113.

It is an arithmetic number, because the mean of its divisors is an integer number (63619770).

Almost surely, 2^381451731 is an apocalyptic number.

381451731 is a deficient number, since it is larger than the sum of its proper divisors (127506429).

381451731 is a wasteful number, since it uses less digits than its factorization.

381451731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88965.

The product of its digits is 10080, while the sum is 33.

The square root of 381451731 is about 19530.7893081667. The cubic root of 381451731 is about 725.2368507161.

The spelling of 381451731 in words is "three hundred eighty-one million, four hundred fifty-one thousand, seven hundred thirty-one".