103312381 has 2 divisors, whose sum is σ = 103312382. Its totient is φ = 103312380.

The previous prime is 103312373. The next prime is 103312393. The reversal of 103312381 is 183213301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103124025 + 188356 = 10155^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 103312381 - 2³ = 103312373 is a prime.

It is a super-2 number, since 2×103312381² = 21346896135778322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103312351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51656190 + 51656191.

It is an arithmetic number, because the mean of its divisors is an integer number (51656191).

Almost surely, 2^103312381 is an apocalyptic number.

It is an amenable number.

103312381 is a deficient number, since it is larger than the sum of its proper divisors (1).

103312381 is an equidigital number, since it uses as much as digits as its factorization.

103312381 is an evil number, because the sum of its binary digits is even.

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

The square root of 103312381 is about 10164.2698212907. The cubic root of 103312381 is about 469.2282203136.

Adding to 103312381 its reverse (183213301), we get a palindrome (286525682).

The spelling of 103312381 in words is "one hundred three million, three hundred twelve thousand, three hundred eighty-one".