215155400304 has 80 divisors (see below), whose sum is σ = 617882230784. Its totient is φ = 64066118400.

The previous prime is 215155400287. The next prime is 215155400309. The reversal of 215155400304 is 403004551512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215155400309) 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, 5541952 + ... + 5580639.

Almost surely, 2^215155400304 is an apocalyptic number.

215155400304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

215155400304 is an abundant number, since it is smaller than the sum of its proper divisors (402726830480).

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

215155400304 is a wasteful number, since it uses less digits than its factorization.

215155400304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122646 (or 11122640 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 215155400304 its reverse (403004551512), we get a palindrome (618159951816).

The spelling of 215155400304 in words is "two hundred fifteen billion, one hundred fifty-five million, four hundred thousand, three hundred four".