2154969222 has 64 divisors (see below), whose sum is σ = 5159531520. Its totient is φ = 586675584.

The previous prime is 2154969163. The next prime is 2154969233. The reversal of 2154969222 is 2229694512.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255708 + ... + 264000.

It is an arithmetic number, because the mean of its divisors is an integer number (80617680).

Almost surely, 2^2154969222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2154969222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2579765760).

2154969222 is an abundant number, since it is smaller than the sum of its proper divisors (3004562298).

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

2154969222 is a wasteful number, since it uses less digits than its factorization.

2154969222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597.

The product of its digits is 155520, while the sum is 42.

The square root of 2154969222 is about 46421.6460500918. The cubic root of 2154969222 is about 1291.6564706810.

The spelling of 2154969222 in words is "two billion, one hundred fifty-four million, nine hundred sixty-nine thousand, two hundred twenty-two".