216252045 has 16 divisors (see below), whose sum is σ = 384448320. Its totient is φ = 115334352.

The previous prime is 216252037. The next prime is 216252067. The reversal of 216252045 is 540252612.

It is not a de Polignac number, because 216252045 - 2³ = 216252037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800799 + ... + 801068.

It is an arithmetic number, because the mean of its divisors is an integer number (24028020).

Almost surely, 2^216252045 is an apocalyptic number.

It is an amenable number.

216252045 is a deficient number, since it is larger than the sum of its proper divisors (168196275).

216252045 is a wasteful number, since it uses less digits than its factorization.

216252045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601881 (or 1601875 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 216252045 is about 14705.5107017744. The cubic root of 216252045 is about 600.2332842856.

The spelling of 216252045 in words is "two hundred sixteen million, two hundred fifty-two thousand, forty-five".