381225913 has 16 divisors (see below), whose sum is σ = 400365504. Its totient is φ = 362672640.

The previous prime is 381225907. The next prime is 381225919. The reversal of 381225913 is 319522183.

It is an interprime number because it is at equal distance from previous prime (381225907) and next prime (381225919).

It is a cyclic number.

It is not a de Polignac number, because 381225913 - 2¹³ = 381217721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381225919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 293281 + ... + 294577.

It is an arithmetic number, because the mean of its divisors is an integer number (25022844).

Almost surely, 2^381225913 is an apocalyptic number.

It is an amenable number.

381225913 is a deficient number, since it is larger than the sum of its proper divisors (19139591).

381225913 is a wasteful number, since it uses less digits than its factorization.

381225913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512.

The product of its digits is 12960, while the sum is 34.

The square root of 381225913 is about 19525.0073751587. The cubic root of 381225913 is about 725.0937099639.

The spelling of 381225913 in words is "three hundred eighty-one million, two hundred twenty-five thousand, nine hundred thirteen".