221453425 has 48 divisors (see below), whose sum is σ = 297480960. Its totient is φ = 163215360.

The previous prime is 221453389. The next prime is 221453437. The reversal of 221453425 is 524354122.

221453425 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 221453425 - 2²⁵ = 187898993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221453393 and 221453402.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2282977 + ... + 2283073.

It is an arithmetic number, because the mean of its divisors is an integer number (6197520).

Almost surely, 2^221453425 is an apocalyptic number.

221453425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

221453425 is a deficient number, since it is larger than the sum of its proper divisors (76027535).

221453425 is a wasteful number, since it uses less digits than its factorization.

221453425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 245 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 221453425 is about 14881.3112661486. The cubic root of 221453425 is about 605.0075585878.

The spelling of 221453425 in words is "two hundred twenty-one million, four hundred fifty-three thousand, four hundred twenty-five".