221122490 has 8 divisors (see below), whose sum is σ = 398020500. Its totient is φ = 88448992.

The previous prime is 221122487. The next prime is 221122507. The reversal of 221122490 is 94221122.

It can be written as a sum of positive squares in 2 ways, for example, as 220017889 + 1104601 = 14833^2 + 1051^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11056115 + ... + 11056134.

Almost surely, 2^221122490 is an apocalyptic number.

221122490 is a deficient number, since it is larger than the sum of its proper divisors (176898010).

221122490 is a wasteful number, since it uses less digits than its factorization.

221122490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112256.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 221122490 is about 14870.1879611523. The cubic root of 221122490 is about 604.7060384629.

The spelling of 221122490 in words is "two hundred twenty-one million, one hundred twenty-two thousand, four hundred ninety".