221973049 has 4 divisors (see below), whose sum is σ = 222036880. Its totient is φ = 221909220.

The previous prime is 221973043. The next prime is 221973091. The reversal of 221973049 is 940379122.

221973049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221973049 - 2³ = 221973041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221972999 and 221973017.

It is not an unprimeable number, because it can be changed into a prime (221973041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26379 + ... + 33760.

It is an arithmetic number, because the mean of its divisors is an integer number (55509220).

Almost surely, 2^221973049 is an apocalyptic number.

It is an amenable number.

221973049 is a deficient number, since it is larger than the sum of its proper divisors (63831).

221973049 is an equidigital number, since it uses as much as digits as its factorization.

221973049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63830.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 221973049 is about 14898.7599819582. The cubic root of 221973049 is about 605.4803907129.

The spelling of 221973049 in words is "two hundred twenty-one million, nine hundred seventy-three thousand, forty-nine".