102249918 has 16 divisors (see below), whose sum is σ = 227222160. Its totient is φ = 34083288.

The previous prime is 102249821. The next prime is 102249923. The reversal of 102249918 is 819942201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946705 + ... + 946812.

It is an arithmetic number, because the mean of its divisors is an integer number (14201385).

Almost surely, 2^102249918 is an apocalyptic number.

102249918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

102249918 is an abundant number, since it is smaller than the sum of its proper divisors (124972242).

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

102249918 is a wasteful number, since it uses less digits than its factorization.

102249918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893528 (or 1893522 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 102249918 is about 10111.8701534385. The cubic root of 102249918 is about 467.6141625929.

The spelling of 102249918 in words is "one hundred two million, two hundred forty-nine thousand, nine hundred eighteen".