215425640054045 has 4 divisors (see below), whose sum is σ = 258510768064860. Its totient is φ = 172340512043232.

The previous prime is 215425640054017. The next prime is 215425640054057. The reversal of 215425640054045 is 540450046524512.

215425640054045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165145656511801 + 50279983542244 = 12850901^2 + 7090838^2 .

It is a cyclic number.

It is not a de Polignac number, because 215425640054045 - 2²⁰ = 215425639005469 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21542564005400 + ... + 21542564005409.

It is an arithmetic number, because the mean of its divisors is an integer number (64627692016215).

Almost surely, 2^{215425640054045} is an apocalyptic number.

It is an amenable number.

215425640054045 is a deficient number, since it is larger than the sum of its proper divisors (43085128010815).

215425640054045 is an equidigital number, since it uses as much as digits as its factorization.

215425640054045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43085128010814.

The product of its (nonzero) digits is 3840000, while the sum is 47.

Adding to 215425640054045 its reverse (540450046524512), we get a palindrome (755875686578557).

The spelling of 215425640054045 in words is "two hundred fifteen trillion, four hundred twenty-five billion, six hundred forty million, fifty-four thousand, forty-five".