215505104 has 10 divisors (see below), whose sum is σ = 417541170. Its totient is φ = 107752544.

The previous prime is 215505077. The next prime is 215505133. The reversal of 215505104 is 401505512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 215502400 + 2704 = 14680^2 + 52^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 215505104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6734519 + ... + 6734550.

It is an arithmetic number, because the mean of its divisors is an integer number (41754117).

Almost surely, 2^215505104 is an apocalyptic number.

It is an amenable number.

215505104 is a deficient number, since it is larger than the sum of its proper divisors (202036066).

215505104 is a wasteful number, since it uses less digits than its factorization.

215505104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13469077 (or 13469071 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 215505104 is about 14680.0920978037. The cubic root of 215505104 is about 599.5414125482.

The spelling of 215505104 in words is "two hundred fifteen million, five hundred five thousand, one hundred four".