2122551 has 16 divisors (see below), whose sum is σ = 3174400. Its totient is φ = 1401624.

The previous prime is 2122531. The next prime is 2122553. The reversal of 2122551 is 1552212.

It is not a de Polignac number, because 2122551 - 2⁹ = 2122039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (198400).

2^2122551 is an apocalyptic number.

2122551 is a deficient number, since it is larger than the sum of its proper divisors (1051849).

2122551 is a wasteful number, since it uses less digits than its factorization.

2122551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 749 counting only the distinct ones).

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

The square root of 2122551 is about 1456.8977314829. The cubic root of 2122551 is about 128.5146717743.

Adding to 2122551 its reverse (1552212), we get a palindrome (3674763).

The spelling of 2122551 in words is "two million, one hundred twenty-two thousand, five hundred fifty-one".