3501216 has 36 divisors (see below), whose sum is σ = 9957402. Its totient is φ = 1166976.

The previous prime is 3501209. The next prime is 3501229. The reversal of 3501216 is 6121053.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 41616 = 1860^2 + 204^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5791 + ... + 6366.

Almost surely, 2^3501216 is an apocalyptic number.

3501216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3501216 is an abundant number, since it is smaller than the sum of its proper divisors (6456186).

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

3501216 is a wasteful number, since it uses less digits than its factorization.

3501216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12173 (or 12162 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 3501216 is about 1871.1536548344. The cubic root of 3501216 is about 151.8470298540.

Adding to 3501216 its reverse (6121053), we get a palindrome (9622269).

The spelling of 3501216 in words is "three million, five hundred one thousand, two hundred sixteen".