4216097981 has 4 divisors (see below), whose sum is σ = 4361480700. Its totient is φ = 4070715264.

The previous prime is 4216097969. The next prime is 4216097989. The reversal of 4216097981 is 1897906124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2530995481 + 1685102500 = 50309^2 + 41050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4216097981 is a prime.

It is a super-2 number, since 2×4216097981² = 35550964370784552722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4216097989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72691316 + ... + 72691373.

It is an arithmetic number, because the mean of its divisors is an integer number (1090370175).

Almost surely, 2^4216097981 is an apocalyptic number.

It is an amenable number.

4216097981 is a deficient number, since it is larger than the sum of its proper divisors (145382719).

4216097981 is a wasteful number, since it uses less digits than its factorization.

4216097981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145382718.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 4216097981 is about 64931.4868226502. The cubic root of 4216097981 is about 1615.4873627452.

The spelling of 4216097981 in words is "four billion, two hundred sixteen million, ninety-seven thousand, nine hundred eighty-one".