102331381 has 12 divisors (see below), whose sum is σ = 111383748. Its totient is φ = 93687552.

The previous prime is 102331379. The next prime is 102331409. The reversal of 102331381 is 183133201.

It can be written as a sum of positive squares in 6 ways, for example, as 31922500 + 70408881 = 5650^2 + 8391^2 .

It is not a de Polignac number, because 102331381 - 2¹ = 102331379 is a prime.

It is a super-2 number, since 2×102331381² = 20943423074734322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102331081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21075 + ... + 25471.

It is an arithmetic number, because the mean of its divisors is an integer number (9281979).

Almost surely, 2^102331381 is an apocalyptic number.

It is an amenable number.

102331381 is a deficient number, since it is larger than the sum of its proper divisors (9052367).

102331381 is an equidigital number, since it uses as much as digits as its factorization.

102331381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 102331381 is about 10115.8974391796. The cubic root of 102331381 is about 467.7383131102.

Adding to 102331381 its reverse (183133201), we get a palindrome (285464582).

The spelling of 102331381 in words is "one hundred two million, three hundred thirty-one thousand, three hundred eighty-one".