381019431 has 32 divisors (see below), whose sum is σ = 564551680. Its totient is φ = 227090304.

The previous prime is 381019423. The next prime is 381019447. The reversal of 381019431 is 134910183.

It is not a de Polignac number, because 381019431 - 2³ = 381019423 is a prime.

It is a super-2 number, since 2×381019431² = 290351613599127522, 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 (381019411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212085 + ... + 213873.

It is an arithmetic number, because the mean of its divisors is an integer number (17642240).

Almost surely, 2^381019431 is an apocalyptic number.

381019431 is a deficient number, since it is larger than the sum of its proper divisors (183532249).

381019431 is a wasteful number, since it uses less digits than its factorization.

381019431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 381019431 is about 19519.7190297402. The cubic root of 381019431 is about 724.9627763687.

The spelling of 381019431 in words is "three hundred eighty-one million, nineteen thousand, four hundred thirty-one".