102819442 has 16 divisors (see below), whose sum is σ = 174052800. Its totient is φ = 45124240.

The previous prime is 102819433. The next prime is 102819443. The reversal of 102819442 is 244918201.

It is not an unprimeable number, because it can be changed into a prime (102819443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79942 + ... + 81217.

It is an arithmetic number, because the mean of its divisors is an integer number (10878300).

Almost surely, 2^102819442 is an apocalyptic number.

102819442 is a deficient number, since it is larger than the sum of its proper divisors (71233358).

102819442 is a wasteful number, since it uses less digits than its factorization.

102819442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161201.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 102819442 is about 10139.9922090700. The cubic root of 102819442 is about 468.4807470105.

The spelling of 102819442 in words is "one hundred two million, eight hundred nineteen thousand, four hundred forty-two".