215145861155 has 8 divisors (see below), whose sum is σ = 258386140512. Its totient is φ = 171975950848.

The previous prime is 215145861103. The next prime is 215145861157. The reversal of 215145861155 is 551168541512.

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

It is a cyclic number.

It is not a de Polignac number, because 215145861155 - 2¹⁶ = 215145795619 is a prime.

It is a super-3 number, since 3×215145861155³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215145861157) 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, 17585534 + ... + 17597763.

It is an arithmetic number, because the mean of its divisors is an integer number (32298267564).

Almost surely, 2^215145861155 is an apocalyptic number.

215145861155 is a deficient number, since it is larger than the sum of its proper divisors (43240279357).

215145861155 is a wasteful number, since it uses less digits than its factorization.

215145861155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35184525.

The product of its digits is 240000, while the sum is 44.

The spelling of 215145861155 in words is "two hundred fifteen billion, one hundred forty-five million, eight hundred sixty-one thousand, one hundred fifty-five".