210542216 has 16 divisors (see below), whose sum is σ = 404395740. Its totient is φ = 102703360.

The previous prime is 210542209. The next prime is 210542221. The reversal of 210542216 is 612245012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 210540100 + 2116 = 14510^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 210542191 and 210542200.

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, 320621 + ... + 321276.

Almost surely, 2^210542216 is an apocalyptic number.

It is an amenable number.

210542216 is a deficient number, since it is larger than the sum of its proper divisors (193853524).

210542216 is a wasteful number, since it uses less digits than its factorization.

210542216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641944 (or 641940 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 210542216 is about 14510.0729150477. The cubic root of 210542216 is about 594.9033253945.

Adding to 210542216 its reverse (612245012), we get a palindrome (822787228).

It can be divided in two parts, 21054 and 2216, that multiplied together give a palindrome (46655664).

The spelling of 210542216 in words is "two hundred ten million, five hundred forty-two thousand, two hundred sixteen".