2351221 has 8 divisors (see below), whose sum is σ = 2473344. Its totient is φ = 2230800.

The previous prime is 2351207. The next prime is 2351263. The reversal of 2351221 is 1221532.

2351221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2351221 - 2¹⁵ = 2318453 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2351195 and 2351204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2351201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3135 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (309168).

2^2351221 is an apocalyptic number.

It is an amenable number.

2351221 is a deficient number, since it is larger than the sum of its proper divisors (122123).

2351221 is a wasteful number, since it uses less digits than its factorization.

2351221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 120, while the sum is 16.

The square root of 2351221 is about 1533.3691662480. The cubic root of 2351221 is about 132.9733113954.

Adding to 2351221 its reverse (1221532), we get a palindrome (3572753).

The spelling of 2351221 in words is "two million, three hundred fifty-one thousand, two hundred twenty-one".