221725496 has 8 divisors (see below), whose sum is σ = 415735320. Its totient is φ = 110862744.

The previous prime is 221725457. The next prime is 221725513. The reversal of 221725496 is 694527122.

221725496 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13857836 + ... + 13857851.

It is an arithmetic number, because the mean of its divisors is an integer number (51966915).

Almost surely, 2^221725496 is an apocalyptic number.

It is an amenable number.

221725496 is a deficient number, since it is larger than the sum of its proper divisors (194009824).

221725496 is a wasteful number, since it uses less digits than its factorization.

221725496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27715693 (or 27715689 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 221725496 is about 14890.4498253075. The cubic root of 221725496 is about 605.2552218724.

The spelling of 221725496 in words is "two hundred twenty-one million, seven hundred twenty-five thousand, four hundred ninety-six".