215187484553 has 16 divisors (see below), whose sum is σ = 223566657552. Its totient is φ = 206960256000.

The previous prime is 215187484531. The next prime is 215187484573. The reversal of 215187484553 is 355484781512.

It can be written as a sum of positive squares in 8 ways, for example, as 21505635904 + 193681848649 = 146648^2 + 440093^2 .

It is not a de Polignac number, because 215187484553 - 2⁶ = 215187484489 is a prime.

It is a super-2 number, since 2×215187484553² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215187484495 and 215187484504.

It is not an unprimeable number, because it can be changed into a prime (215187484573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6391223 + ... + 6424803.

It is an arithmetic number, because the mean of its divisors is an integer number (13972916097).

Almost surely, 2^215187484553 is an apocalyptic number.

It is an amenable number.

215187484553 is a deficient number, since it is larger than the sum of its proper divisors (8379172999).

215187484553 is a wasteful number, since it uses less digits than its factorization.

215187484553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35836.

The product of its digits is 5376000, while the sum is 53.

The spelling of 215187484553 in words is "two hundred fifteen billion, one hundred eighty-seven million, four hundred eighty-four thousand, five hundred fifty-three".