216067157621 has 12 divisors (see below), whose sum is σ = 254786493132. Its totient is φ = 182663425728.

The previous prime is 216067157573. The next prime is 216067157627. The reversal of 216067157621 is 126751760612.

It can be written as a sum of positive squares in 2 ways, for example, as 173647224100 + 42419933521 = 416710^2 + 205961^2 .

It is a de Polignac number, because none of the positive numbers 2^k-216067157621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216067157627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30198710 + ... + 30205863.

It is an arithmetic number, because the mean of its divisors is an integer number (21232207761).

Almost surely, 2^216067157621 is an apocalyptic number.

It is an amenable number.

216067157621 is a deficient number, since it is larger than the sum of its proper divisors (38719335511).

216067157621 is an equidigital number, since it uses as much as digits as its factorization.

216067157621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60404660 (or 60404653 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 216067157621 in words is "two hundred sixteen billion, sixty-seven million, one hundred fifty-seven thousand, six hundred twenty-one".