215341405253 has 4 divisors (see below), whose sum is σ = 231906128748. Its totient is φ = 198776681760.

The previous prime is 215341405247. The next prime is 215341405259. The reversal of 215341405253 is 352504143512.

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

It is an interprime number because it is at equal distance from previous prime (215341405247) and next prime (215341405259).

It can be written as a sum of positive squares in 2 ways, for example, as 34574427364 + 180766977889 = 185942^2 + 425167^2 .

It is a cyclic number.

It is not a de Polignac number, because 215341405253 - 2⁶ = 215341405189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215341405259) 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, 8282361728 + ... + 8282361753.

It is an arithmetic number, because the mean of its divisors is an integer number (57976532187).

Almost surely, 2^215341405253 is an apocalyptic number.

It is an amenable number.

215341405253 is a deficient number, since it is larger than the sum of its proper divisors (16564723495).

215341405253 is a wasteful number, since it uses less digits than its factorization.

215341405253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16564723494.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 215341405253 its reverse (352504143512), we get a palindrome (567845548765).

The spelling of 215341405253 in words is "two hundred fifteen billion, three hundred forty-one million, four hundred five thousand, two hundred fifty-three".