215152540123551 has 8 divisors (see below), whose sum is σ = 290326319203200. Its totient is φ = 141706893896472.

The previous prime is 215152540123513. The next prime is 215152540123603. The reversal of 215152540123551 is 155321045251512.

215152540123551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215152540123551 - 2²⁹ = 215152003252639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215152540123051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 432033212851 + ... + 432033213348.

It is an arithmetic number, because the mean of its divisors is an integer number (36290789900400).

Almost surely, 2^{215152540123551} is an apocalyptic number.

215152540123551 is a deficient number, since it is larger than the sum of its proper divisors (75173779079649).

215152540123551 is an equidigital number, since it uses as much as digits as its factorization.

215152540123551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864066426285.

The product of its (nonzero) digits is 300000, while the sum is 42.

The spelling of 215152540123551 in words is "two hundred fifteen trillion, one hundred fifty-two billion, five hundred forty million, one hundred twenty-three thousand, five hundred fifty-one".