216425755 has 32 divisors (see below), whose sum is σ = 322172928. Its totient is φ = 135907200.

The previous prime is 216425723. The next prime is 216425767. The reversal of 216425755 is 557524612.

It is not a de Polignac number, because 216425755 - 2⁵ = 216425723 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57790 + ... + 61420.

It is an arithmetic number, because the mean of its divisors is an integer number (10067904).

Almost surely, 2^216425755 is an apocalyptic number.

216425755 is a deficient number, since it is larger than the sum of its proper divisors (105747173).

216425755 is a wasteful number, since it uses less digits than its factorization.

216425755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787.

The product of its digits is 84000, while the sum is 37.

The square root of 216425755 is about 14711.4158054213. The cubic root of 216425755 is about 600.3939588633.

The spelling of 216425755 in words is "two hundred sixteen million, four hundred twenty-five thousand, seven hundred fifty-five".