11220251 has 8 divisors (see below), whose sum is σ = 13380864. Its totient is φ = 9199080.

The previous prime is 11220247. The next prime is 11220269. The reversal of 11220251 is 15202211.

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

It is not a de Polignac number, because 11220251 - 2² = 11220247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11220211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34685 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (1672608).

Almost surely, 2^11220251 is an apocalyptic number.

11220251 is a deficient number, since it is larger than the sum of its proper divisors (2160613).

11220251 is an equidigital number, since it uses as much as digits as its factorization.

11220251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69721.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 11220251 is about 3349.6643115393. The cubic root of 11220251 is about 223.8725558530.

Adding to 11220251 its reverse (15202211), we get a palindrome (26422462).

The spelling of 11220251 in words is "eleven million, two hundred twenty thousand, two hundred fifty-one".