102311919 has 12 divisors (see below), whose sum is σ = 151778536. Its totient is φ = 66364272.

The previous prime is 102311897. The next prime is 102311927. The reversal of 102311919 is 919113201.

It is not a de Polignac number, because 102311919 - 2¹² = 102307823 is a prime.

It is a super-2 number, since 2×102311919² = 20935457538925122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102311892 and 102311901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102311969) 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, 153289 + ... + 153954.

Almost surely, 2^102311919 is an apocalyptic number.

102311919 is a deficient number, since it is larger than the sum of its proper divisors (49466617).

102311919 is a wasteful number, since it uses less digits than its factorization.

102311919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307286 (or 307283 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 102311919 is about 10114.9354422062. The cubic root of 102311919 is about 467.7086587979.

The spelling of 102311919 in words is "one hundred two million, three hundred eleven thousand, nine hundred nineteen".