103011381 has 48 divisors (see below), whose sum is σ = 173916288. Its totient is φ = 58060800.

The previous prime is 103011379. The next prime is 103011409. The reversal of 103011381 is 183110301.

It is a happy number.

It is not a de Polignac number, because 103011381 - 2¹ = 103011379 is a prime.

It is a super-2 number, since 2×103011381² = 21222689231054322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103011301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 162936 + ... + 163566.

It is an arithmetic number, because the mean of its divisors is an integer number (3623256).

Almost surely, 2^103011381 is an apocalyptic number.

103011381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103011381 is a deficient number, since it is larger than the sum of its proper divisors (70904907).

103011381 is a wasteful number, since it uses less digits than its factorization.

103011381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 759 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 103011381 is about 10149.4522512301. The cubic root of 103011381 is about 468.7720791733.

Adding to 103011381 its reverse (183110301), we get a palindrome (286121682).

The spelling of 103011381 in words is "one hundred three million, eleven thousand, three hundred eighty-one".