215220023331051 has 4 divisors (see below), whose sum is σ = 286960031108072. Its totient is φ = 143480015554032.

The previous prime is 215220023331041. The next prime is 215220023331073. The reversal of 215220023331051 is 150133320022512.

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

It is not a de Polignac number, because 215220023331051 - 2⁴⁵ = 180035651242219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215220023331011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35870003888506 + ... + 35870003888511.

It is an arithmetic number, because the mean of its divisors is an integer number (71740007777018).

Almost surely, 2^{215220023331051} is an apocalyptic number.

215220023331051 is a deficient number, since it is larger than the sum of its proper divisors (71740007777021).

215220023331051 is an equidigital number, since it uses as much as digits as its factorization.

215220023331051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71740007777020.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 215220023331051 its reverse (150133320022512), we get a palindrome (365353343353563).

The spelling of 215220023331051 in words is "two hundred fifteen trillion, two hundred twenty billion, twenty-three million, three hundred thirty-one thousand, fifty-one".