102181516 has 6 divisors (see below), whose sum is σ = 178817660. Its totient is φ = 51090756.

The previous prime is 102181511. The next prime is 102181517. The reversal of 102181516 is 615181201.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (102181511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12772686 + ... + 12772693.

Almost surely, 2^102181516 is an apocalyptic number.

It is an amenable number.

102181516 is a deficient number, since it is larger than the sum of its proper divisors (76636144).

102181516 is a wasteful number, since it uses less digits than its factorization.

102181516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25545383 (or 25545381 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 102181516 is about 10108.4873250155. The cubic root of 102181516 is about 467.5098662449.

The spelling of 102181516 in words is "one hundred two million, one hundred eighty-one thousand, five hundred sixteen".