11220431 has 8 divisors (see below), whose sum is σ = 11886720. Its totient is φ = 10561752.

The previous prime is 11220427. The next prime is 11220457. The reversal of 11220431 is 13402211.

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 11220431 - 2² = 11220427 is a prime.

It is a super-2 number, since 2×11220431² = 251796143651522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (1485840).

Almost surely, 2^11220431 is an apocalyptic number.

11220431 is a deficient number, since it is larger than the sum of its proper divisors (666289).

11220431 is a wasteful number, since it uses less digits than its factorization.

11220431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 11220431 is about 3349.6911797955. The cubic root of 11220431 is about 223.8737529992.

Adding to 11220431 its reverse (13402211), we get a palindrome (24622642).

The spelling of 11220431 in words is "eleven million, two hundred twenty thousand, four hundred thirty-one".