11220437 has 4 divisors (see below), whose sum is σ = 11302476. Its totient is φ = 11138400.

The previous prime is 11220427. The next prime is 11220457. The reversal of 11220437 is 73402211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9186961 + 2033476 = 3031^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220437 - 2¹⁸ = 10958293 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 (11220427) 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, 40814 + ... + 41087.

It is an arithmetic number, because the mean of its divisors is an integer number (2825619).

Almost surely, 2^11220437 is an apocalyptic number.

It is an amenable number.

11220437 is a deficient number, since it is larger than the sum of its proper divisors (82039).

11220437 is an equidigital number, since it uses as much as digits as its factorization.

11220437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82038.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 11220437 is about 3349.6920754004. The cubic root of 11220437 is about 223.8737929039.

Adding to 11220437 its reverse (73402211), we get a palindrome (84622648).

The spelling of 11220437 in words is "eleven million, two hundred twenty thousand, four hundred thirty-seven".