2154227766 has 16 divisors (see below), whose sum is σ = 4311552000. Its totient is φ = 717559848.

The previous prime is 2154227753. The next prime is 2154227767. The reversal of 2154227766 is 6677224512.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154227767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119926 + ... + 136713.

It is an arithmetic number, because the mean of its divisors is an integer number (269472000).

Almost surely, 2^2154227766 is an apocalyptic number.

2154227766 is an abundant number, since it is smaller than the sum of its proper divisors (2157324234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2154227766 is a wasteful number, since it uses less digits than its factorization.

2154227766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258043.

The product of its digits is 282240, while the sum is 42.

The square root of 2154227766 is about 46413.6592610408. The cubic root of 2154227766 is about 1291.5083144583.

The spelling of 2154227766 in words is "two billion, one hundred fifty-four million, two hundred twenty-seven thousand, seven hundred sixty-six".