2551122 has 64 divisors (see below), whose sum is σ = 6877440. Its totient is φ = 684288.

The previous prime is 2551103. The next prime is 2551123. The reversal of 2551122 is 2211552.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2551095 and 2551104.

It is not an unprimeable number, because it can be changed into a prime (2551123) 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, 6228 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (107460).

2^2551122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3438720).

2551122 is an abundant number, since it is smaller than the sum of its proper divisors (4326318).

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

2551122 is a wasteful number, since it uses less digits than its factorization.

2551122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 426 counting only the distinct ones).

The product of its digits is 200, while the sum is 18.

The square root of 2551122 is about 1597.2232154586. The cubic root of 2551122 is about 136.6397554257.

Adding to 2551122 its reverse (2211552), we get a palindrome (4762674).

The spelling of 2551122 in words is "two million, five hundred fifty-one thousand, one hundred twenty-two".