102731216 has 20 divisors (see below), whose sum is σ = 227476512. Its totient is φ = 44027616.

The previous prime is 102731207. The next prime is 102731227. The reversal of 102731216 is 612137201.

It is a junction number, because it is equal to n+sod(n) for n = 102731191 and 102731200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458510 + ... + 458733.

Almost surely, 2^102731216 is an apocalyptic number.

102731216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

102731216 is an abundant number, since it is smaller than the sum of its proper divisors (124745296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102731216 is an equidigital number, since it uses as much as digits as its factorization.

102731216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917258 (or 917252 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 102731216 is about 10135.6408776160. The cubic root of 102731216 is about 468.3467126646.

Adding to 102731216 its reverse (612137201), we get a palindrome (714868417).

The spelling of 102731216 in words is "one hundred two million, seven hundred thirty-one thousand, two hundred sixteen".