215552775425045 has 4 divisors (see below), whose sum is σ = 258663330510060. Its totient is φ = 172442220340032.

The previous prime is 215552775425041. The next prime is 215552775425101. The reversal of 215552775425045 is 540524577255512.

It is a happy number.

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 163576144716721 + 51976630708324 = 12789689^2 + 7209482^2 .

It is a cyclic number.

It is not a de Polignac number, because 215552775425045 - 2² = 215552775425041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215552775425041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21555277542500 + ... + 21555277542509.

It is an arithmetic number, because the mean of its divisors is an integer number (64665832627515).

Almost surely, 2^{215552775425045} is an apocalyptic number.

It is an amenable number.

215552775425045 is a deficient number, since it is larger than the sum of its proper divisors (43110555085015).

215552775425045 is an equidigital number, since it uses as much as digits as its factorization.

215552775425045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43110555085014.

The product of its (nonzero) digits is 98000000, while the sum is 59.

The spelling of 215552775425045 in words is "two hundred fifteen trillion, five hundred fifty-two billion, seven hundred seventy-five million, four hundred twenty-five thousand, forty-five".