2220751 has 4 divisors (see below), whose sum is σ = 2391592. Its totient is φ = 2049912.

The previous prime is 2220749. The next prime is 2220773. The reversal of 2220751 is 1570222.

2220751 = T₅₇₈ + T₅₇₉ + ... + T₅₉₀.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2220751 - 2¹ = 2220749 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 (2220731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85401 + ... + 85426.

It is an arithmetic number, because the mean of its divisors is an integer number (597898).

2^2220751 is an apocalyptic number.

2220751 is a deficient number, since it is larger than the sum of its proper divisors (170841).

2220751 is a wasteful number, since it uses less digits than its factorization.

2220751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170840.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2220751 is about 1490.2184403637. The cubic root of 2220751 is about 130.4667834800.

Adding to 2220751 its reverse (1570222), we get a palindrome (3790973).

The spelling of 2220751 in words is "two million, two hundred twenty thousand, seven hundred fifty-one".