215134290549 has 8 divisors (see below), whose sum is σ = 318717467520. Its totient is φ = 143422860348.

The previous prime is 215134290509. The next prime is 215134290571. The reversal of 215134290549 is 945092431512.

It is a happy number.

215134290549 is a `hidden beast` number, since 2 + 1 + 5 + 13 + 4 + 2 + 90 + 549 = 666.

It is not a de Polignac number, because 215134290549 - 2⁷ = 215134290421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215134290509) 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, 3983968317 + ... + 3983968370.

It is an arithmetic number, because the mean of its divisors is an integer number (39839683440).

Almost surely, 2^215134290549 is an apocalyptic number.

It is an amenable number.

215134290549 is a deficient number, since it is larger than the sum of its proper divisors (103583176971).

215134290549 is an equidigital number, since it uses as much as digits as its factorization.

215134290549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7967936696 (or 7967936690 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 215134290549 in words is "two hundred fifteen billion, one hundred thirty-four million, two hundred ninety thousand, five hundred forty-nine".