1581370103 has 2 divisors, whose sum is σ = 1581370104. Its totient is φ = 1581370102.

The previous prime is 1581370069. The next prime is 1581370111. The reversal of 1581370103 is 3010731851.

It is a strong prime.

It is an emirp because it is prime and its reverse (3010731851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1581370103 - 2⁸ = 1581369847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1581370163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790685051 + 790685052.

It is an arithmetic number, because the mean of its divisors is an integer number (790685052).

Almost surely, 2^1581370103 is an apocalyptic number.

1581370103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1581370103 is an equidigital number, since it uses as much as digits as its factorization.

1581370103 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 1581370103 is about 39766.4444349756. Note that the first 4 decimals coincide. The cubic root of 1581370103 is about 1165.0498490953.

The spelling of 1581370103 in words is "one billion, five hundred eighty-one million, three hundred seventy thousand, one hundred three".