381571013 has 2 divisors, whose sum is σ = 381571014. Its totient is φ = 381571012.

The previous prime is 381571007. The next prime is 381571037. The reversal of 381571013 is 310175183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377252929 + 4318084 = 19423^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 381571013 - 2¹² = 381566917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381571093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190785506 + 190785507.

It is an arithmetic number, because the mean of its divisors is an integer number (190785507).

Almost surely, 2^381571013 is an apocalyptic number.

It is an amenable number.

381571013 is a deficient number, since it is larger than the sum of its proper divisors (1).

381571013 is an equidigital number, since it uses as much as digits as its factorization.

381571013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 381571013 is about 19533.8427607064. The cubic root of 381571013 is about 725.3124379874.

The spelling of 381571013 in words is "three hundred eighty-one million, five hundred seventy-one thousand, thirteen".