3516220415621 has 16 divisors (see below), whose sum is σ = 3674036931840. Its totient is φ = 3360851860800.

The previous prime is 3516220415611. The next prime is 3516220415641. The reversal of 3516220415621 is 1265140226153.

3516220415621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3516220415621 is a prime.

It is a super-2 number, since 2×3516220415621² (a number of 26 digits) 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 (3516220415611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20143700 + ... + 20317506.

It is an arithmetic number, because the mean of its divisors is an integer number (229627308240).

Almost surely, 2^{3516220415621} is an apocalyptic number.

It is an amenable number.

3516220415621 is a deficient number, since it is larger than the sum of its proper divisors (157816516219).

3516220415621 is a wasteful number, since it uses less digits than its factorization.

3516220415621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180844.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 3516220415621 in words is "three trillion, five hundred sixteen billion, two hundred twenty million, four hundred fifteen thousand, six hundred twenty-one".