215601230621 has 8 divisors (see below), whose sum is σ = 249871849344. Its totient is φ = 182198222640.

The previous prime is 215601230567. The next prime is 215601230623. The reversal of 215601230621 is 126032106512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215601230621 - 2¹⁴ = 215601214237 is a prime.

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 (215601230623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216902150 + ... + 216903143.

It is an arithmetic number, because the mean of its divisors is an integer number (31233981168).

Almost surely, 2^215601230621 is an apocalyptic number.

It is an amenable number.

215601230621 is a deficient number, since it is larger than the sum of its proper divisors (34270618723).

215601230621 is an equidigital number, since it uses as much as digits as its factorization.

215601230621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433805371.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 215601230621 in words is "two hundred fifteen billion, six hundred one million, two hundred thirty thousand, six hundred twenty-one".