102311145 has 24 divisors (see below), whose sum is σ = 177777600. Its totient is φ = 54431136.

The previous prime is 102311141. The next prime is 102311149. The reversal of 102311145 is 541113201.

It is an interprime number because it is at equal distance from previous prime (102311141) and next prime (102311149).

It is not a de Polignac number, because 102311145 - 2² = 102311141 is a prime.

It is a super-2 number, since 2×102311145² = 20935140782422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102311141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17166 + ... + 22344.

It is an arithmetic number, because the mean of its divisors is an integer number (7407400).

Almost surely, 2^102311145 is an apocalyptic number.

102311145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102311145 is a deficient number, since it is larger than the sum of its proper divisors (75466455).

102311145 is a wasteful number, since it uses less digits than its factorization.

102311145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629 (or 5626 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 102311145 is about 10114.8971818798. The cubic root of 102311145 is about 467.7074793738.

Adding to 102311145 its reverse (541113201), we get a palindrome (643424346).

The spelling of 102311145 in words is "one hundred two million, three hundred eleven thousand, one hundred forty-five".