221451352 has 32 divisors (see below), whose sum is σ = 431262720. Its totient is φ = 106492320.

The previous prime is 221451341. The next prime is 221451353. The reversal of 221451352 is 253154122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221451353) 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, 38743 + ... + 44089.

It is an arithmetic number, because the mean of its divisors is an integer number (13476960).

Almost surely, 2^221451352 is an apocalyptic number.

It is an amenable number.

221451352 is a deficient number, since it is larger than the sum of its proper divisors (209811368).

221451352 is a wasteful number, since it uses less digits than its factorization.

221451352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551 (or 5547 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 221451352 is about 14881.2416148653. The cubic root of 221451352 is about 605.0056707799.

The spelling of 221451352 in words is "two hundred twenty-one million, four hundred fifty-one thousand, three hundred fifty-two".