2145222554 has 8 divisors (see below), whose sum is σ = 3407118228. Its totient is φ = 1009516480.

The previous prime is 2145222533. The next prime is 2145222577. The reversal of 2145222554 is 4552225412.

It can be written as a sum of positive squares in 2 ways, for example, as 2108921929 + 36300625 = 45923^2 + 6025^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2145222554.

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, 31547357 + ... + 31547424.

Almost surely, 2^2145222554 is an apocalyptic number.

2145222554 is a deficient number, since it is larger than the sum of its proper divisors (1261895674).

2145222554 is a wasteful number, since it uses less digits than its factorization.

2145222554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63094800.

The product of its digits is 32000, while the sum is 32.

The square root of 2145222554 is about 46316.5473022331. The cubic root of 2145222554 is about 1289.7061915257.

Adding to 2145222554 its reverse (4552225412), we get a palindrome (6697447966).

The spelling of 2145222554 in words is "two billion, one hundred forty-five million, two hundred twenty-two thousand, five hundred fifty-four".