102316381 has 2 divisors, whose sum is σ = 102316382. Its totient is φ = 102316380.

The previous prime is 102316369. The next prime is 102316427. The reversal of 102316381 is 183613201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59151481 + 43164900 = 7691^2 + 6570^2 .

It is an emirp because it is prime and its reverse (183613201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102316381 - 2¹⁵ = 102283613 is a prime.

It is a super-2 number, since 2×102316381² = 20937283641874322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102316681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51158190 + 51158191.

It is an arithmetic number, because the mean of its divisors is an integer number (51158191).

Almost surely, 2^102316381 is an apocalyptic number.

It is an amenable number.

102316381 is a deficient number, since it is larger than the sum of its proper divisors (1).

102316381 is an equidigital number, since it uses as much as digits as its factorization.

102316381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 102316381 is about 10115.1560047287. The cubic root of 102316381 is about 467.7154578939.

Adding to 102316381 its reverse (183613201), we get a palindrome (285929582).

The spelling of 102316381 in words is "one hundred two million, three hundred sixteen thousand, three hundred eighty-one".