215252503001 has 4 divisors (see below), whose sum is σ = 217383716004. Its totient is φ = 213121290000.

The previous prime is 215252502973. The next prime is 215252503013. The reversal of 215252503001 is 100305252512.

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 153475897600 + 61776605401 = 391760^2 + 248549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215252503001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215252508001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1065606350 + ... + 1065606551.

It is an arithmetic number, because the mean of its divisors is an integer number (54345929001).

Almost surely, 2^215252503001 is an apocalyptic number.

It is an amenable number.

215252503001 is a deficient number, since it is larger than the sum of its proper divisors (2131213003).

215252503001 is a wasteful number, since it uses less digits than its factorization.

215252503001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131213002.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 215252503001 its reverse (100305252512), we get a palindrome (315557755513).

The spelling of 215252503001 in words is "two hundred fifteen billion, two hundred fifty-two million, five hundred three thousand, one".