2251421022 has 32 divisors (see below), whose sum is σ = 4554464544. Its totient is φ = 741888000.

The previous prime is 2251420999. The next prime is 2251421059. The reversal of 2251421022 is 2201241522.

It is a self number, because there is not a number n which added to its sum of digits gives 2251421022.

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, 697372 + ... + 700592.

It is an arithmetic number, because the mean of its divisors is an integer number (142327017).

Almost surely, 2^2251421022 is an apocalyptic number.

2251421022 is an abundant number, since it is smaller than the sum of its proper divisors (2303043522).

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

2251421022 is a wasteful number, since it uses less digits than its factorization.

2251421022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2251421022 is about 47449.1414253198. The cubic root of 2251421022 is about 1310.6465006187.

Adding to 2251421022 its reverse (2201241522), we get a palindrome (4452662544).

The spelling of 2251421022 in words is "two billion, two hundred fifty-one million, four hundred twenty-one thousand, twenty-two".