221098498 has 16 divisors (see below), whose sum is σ = 353195640. Its totient is φ = 103442176.

The previous prime is 221098477. The next prime is 221098499. The reversal of 221098498 is 894890122.

It can be written as a sum of positive squares in 4 ways, for example, as 219543489 + 1555009 = 14817^2 + 1247^2 .

It is not an unprimeable number, because it can be changed into a prime (221098499) 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, 12913 + ... + 24676.

Almost surely, 2^221098498 is an apocalyptic number.

221098498 is a deficient number, since it is larger than the sum of its proper divisors (132097142).

221098498 is a wasteful number, since it uses less digits than its factorization.

221098498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37781.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 221098498 is about 14869.3812245164. The cubic root of 221098498 is about 604.6841672788.

The spelling of 221098498 in words is "two hundred twenty-one million, ninety-eight thousand, four hundred ninety-eight".