221131035 has 24 divisors (see below), whose sum is σ = 383816160. Its totient is φ = 117775872.

The previous prime is 221130977. The next prime is 221131073. The reversal of 221131035 is 530131122.

221131035 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221131035 - 2⁶ = 221130971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221130999 and 221131017.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34827 + ... + 40683.

It is an arithmetic number, because the mean of its divisors is an integer number (15992340).

Almost surely, 2^221131035 is an apocalyptic number.

221131035 is a deficient number, since it is larger than the sum of its proper divisors (162685125).

221131035 is a wasteful number, since it uses less digits than its factorization.

221131035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707 (or 6704 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 221131035 is about 14870.4752782149. The cubic root of 221131035 is about 604.7138277302.

Adding to 221131035 its reverse (530131122), we get a palindrome (751262157).

The spelling of 221131035 in words is "two hundred twenty-one million, one hundred thirty-one thousand, thirty-five".