10216987 has 4 divisors (see below), whose sum is σ = 11145816. Its totient is φ = 9288160.

The previous prime is 10216981. The next prime is 10217029. The reversal of 10216987 is 78961201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10216987 - 2¹⁵ = 10184219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10216981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464398 + ... + 464419.

It is an arithmetic number, because the mean of its divisors is an integer number (2786454).

Almost surely, 2^10216987 is an apocalyptic number.

10216987 is a deficient number, since it is larger than the sum of its proper divisors (928829).

10216987 is an equidigital number, since it uses as much as digits as its factorization.

10216987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928828.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 10216987 is about 3196.4021962200. The cubic root of 10216987 is about 216.9906131130.

It can be divided in two parts, 1021 and 6987, that added together give a palindrome (8008).

The spelling of 10216987 in words is "ten million, two hundred sixteen thousand, nine hundred eighty-seven".