381258813 has 32 divisors (see below), whose sum is σ = 581212800. Its totient is φ = 220225536.

The previous prime is 381258809. The next prime is 381258817. The reversal of 381258813 is 318852183.

It is an interprime number because it is at equal distance from previous prime (381258809) and next prime (381258817).

It is not a de Polignac number, because 381258813 - 2² = 381258809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381258817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 409933 + ... + 410861.

It is an arithmetic number, because the mean of its divisors is an integer number (18162900).

Almost surely, 2^381258813 is an apocalyptic number.

It is an amenable number.

381258813 is a deficient number, since it is larger than the sum of its proper divisors (199953987).

381258813 is a wasteful number, since it uses less digits than its factorization.

381258813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581.

The product of its digits is 46080, while the sum is 39.

The square root of 381258813 is about 19525.8498662670. The cubic root of 381258813 is about 725.1145680221.

The spelling of 381258813 in words is "three hundred eighty-one million, two hundred fifty-eight thousand, eight hundred thirteen".