215304502242151 has 4 divisors (see below), whose sum is σ = 246062288276752. Its totient is φ = 184546716207552.

The previous prime is 215304502242133. The next prime is 215304502242223. The reversal of 215304502242151 is 151242205403512.

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

It is a cyclic number.

It is not a de Polignac number, because 215304502242151 - 2¹¹ = 215304502240103 is a prime.

It is a super-2 number, since 2×215304502242151² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215304502242151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215304502242121) 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, 15378893017290 + ... + 15378893017303.

It is an arithmetic number, because the mean of its divisors is an integer number (61515572069188).

Almost surely, 2^{215304502242151} is an apocalyptic number.

215304502242151 is a deficient number, since it is larger than the sum of its proper divisors (30757786034601).

215304502242151 is an equidigital number, since it uses as much as digits as its factorization.

215304502242151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30757786034600.

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 215304502242151 its reverse (151242205403512), we get a palindrome (366546707645663).

The spelling of 215304502242151 in words is "two hundred fifteen trillion, three hundred four billion, five hundred two million, two hundred forty-two thousand, one hundred fifty-one".