215259028964 has 24 divisors (see below), whose sum is σ = 444405739008. Its totient is φ = 89277937920.

The previous prime is 215259028877. The next prime is 215259028969. The reversal of 215259028964 is 469820952512.

It is not an unprimeable number, because it can be changed into a prime (215259028969) 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, 123996269 + ... + 123998004.

It is an arithmetic number, because the mean of its divisors is an integer number (18516905792).

Almost surely, 2^215259028964 is an apocalyptic number.

It is an amenable number.

215259028964 is an abundant number, since it is smaller than the sum of its proper divisors (229146710044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215259028964 is a wasteful number, since it uses less digits than its factorization.

215259028964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247994315 (or 247994313 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 215259028964 in words is "two hundred fifteen billion, two hundred fifty-nine million, twenty-eight thousand, nine hundred sixty-four".