216514545 has 16 divisors (see below), whose sum is σ = 373071552. Its totient is φ = 106591680.

The previous prime is 216514537. The next prime is 216514577. The reversal of 216514545 is 545415612.

It is not a de Polignac number, because 216514545 - 2³ = 216514537 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, 554971 + ... + 555360.

It is an arithmetic number, because the mean of its divisors is an integer number (23316972).

Almost surely, 2^216514545 is an apocalyptic number.

It is an amenable number.

216514545 is a deficient number, since it is larger than the sum of its proper divisors (156557007).

216514545 is a wasteful number, since it uses less digits than its factorization.

216514545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110352.

The product of its digits is 24000, while the sum is 33.

The square root of 216514545 is about 14714.4332204812. The cubic root of 216514545 is about 600.4760527453.

The spelling of 216514545 in words is "two hundred sixteen million, five hundred fourteen thousand, five hundred forty-five".