221154030 has 64 divisors (see below), whose sum is σ = 592073280. Its totient is φ = 58741632.

The previous prime is 221154019. The next prime is 221154061. The reversal of 221154030 is 30451122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221153994 and 221154012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73312 + ... + 76268.

It is an arithmetic number, because the mean of its divisors is an integer number (9251145).

Almost surely, 2^221154030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221154030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296036640).

221154030 is an abundant number, since it is smaller than the sum of its proper divisors (370919250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221154030 is a wasteful number, since it uses less digits than its factorization.

221154030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3250 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221154030 is about 14871.2484344792. The cubic root of 221154030 is about 604.7347880211.

The spelling of 221154030 in words is "two hundred twenty-one million, one hundred fifty-four thousand, thirty".