215345104 has 20 divisors (see below), whose sum is σ = 449326276. Its totient is φ = 99389952.

The previous prime is 215345101. The next prime is 215345129. The reversal of 215345104 is 401543512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 142754704 + 72590400 = 11948^2 + 8520^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215345101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517449 + ... + 517864.

Almost surely, 2^215345104 is an apocalyptic number.

It is an amenable number.

215345104 is an abundant number, since it is smaller than the sum of its proper divisors (233981172).

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

215345104 is a wasteful number, since it uses less digits than its factorization.

215345104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035334 (or 1035328 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 215345104 is about 14674.6415288415. The cubic root of 215345104 is about 599.3930009421.

Adding to 215345104 its reverse (401543512), we get a palindrome (616888616).

The spelling of 215345104 in words is "two hundred fifteen million, three hundred forty-five thousand, one hundred four".