2251423242 has 64 divisors (see below), whose sum is σ = 5136203520. Its totient is φ = 730598400.

The previous prime is 2251423217. The next prime is 2251423243. The reversal of 2251423242 is 2423241522.

It is a super-2 number, since 2×2251423242² = 10137813229235581128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2251423243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1489267 + ... + 1490777.

It is an arithmetic number, because the mean of its divisors is an integer number (80253180).

Almost surely, 2^2251423242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2251423242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2568101760).

2251423242 is an abundant number, since it is smaller than the sum of its proper divisors (2884780278).

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

2251423242 is a wasteful number, since it uses less digits than its factorization.

2251423242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236 (or 2230 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 2251423242 is about 47449.1648187826. The cubic root of 2251423242 is about 1310.6469314035.

Adding to 2251423242 its reverse (2423241522), we get a palindrome (4674664764).

The spelling of 2251423242 in words is "two billion, two hundred fifty-one million, four hundred twenty-three thousand, two hundred forty-two".