1097826221 has 16 divisors (see below), whose sum is σ = 1177473024. Its totient is φ = 1019921664.

The previous prime is 1097826217. The next prime is 1097826283. The reversal of 1097826221 is 1226287901.

It is not a de Polignac number, because 1097826221 - 2² = 1097826217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097825221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669815 + ... + 671451.

It is an arithmetic number, because the mean of its divisors is an integer number (73592064).

Almost surely, 2^1097826221 is an apocalyptic number.

It is an amenable number.

1097826221 is a deficient number, since it is larger than the sum of its proper divisors (79646803).

1097826221 is a wasteful number, since it uses less digits than its factorization.

1097826221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1097826221 is about 33133.4607458985. The cubic root of 1097826221 is about 1031.5996825479.

The spelling of 1097826221 in words is "one billion, ninety-seven million, eight hundred twenty-six thousand, two hundred twenty-one".