215563145 has 16 divisors (see below), whose sum is σ = 313020288. Its totient is φ = 139119360.

The previous prime is 215563133. The next prime is 215563157. The reversal of 215563145 is 541365512.

It is an interprime number because it is at equal distance from previous prime (215563133) and next prime (215563157).

It is not a de Polignac number, because 215563145 - 2⁸ = 215562889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180551 + ... + 181740.

It is an arithmetic number, because the mean of its divisors is an integer number (19563768).

Almost surely, 2^215563145 is an apocalyptic number.

It is an amenable number.

215563145 is a deficient number, since it is larger than the sum of its proper divisors (97457143).

215563145 is a wasteful number, since it uses less digits than its factorization.

215563145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362320.

The product of its digits is 18000, while the sum is 32.

The square root of 215563145 is about 14682.0688256117. The cubic root of 215563145 is about 599.5952316286.

The spelling of 215563145 in words is "two hundred fifteen million, five hundred sixty-three thousand, one hundred forty-five".