216249695 has 4 divisors (see below), whose sum is σ = 259499640. Its totient is φ = 172999752.

The previous prime is 216249689. The next prime is 216249727. The reversal of 216249695 is 596942612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216249695 - 2¹² = 216245599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21624965 + ... + 21624974.

It is an arithmetic number, because the mean of its divisors is an integer number (64874910).

Almost surely, 2^216249695 is an apocalyptic number.

216249695 is a deficient number, since it is larger than the sum of its proper divisors (43249945).

216249695 is an equidigital number, since it uses as much as digits as its factorization.

216249695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43249944.

The product of its digits is 233280, while the sum is 44.

The square root of 216249695 is about 14705.4307995380. The cubic root of 216249695 is about 600.2311100429.

The spelling of 216249695 in words is "two hundred sixteen million, two hundred forty-nine thousand, six hundred ninety-five".