221657273403450 has 48 divisors (see below), whose sum is σ = 549926545499040. Its totient is φ = 59085325869120.

The previous prime is 221657273403403. The next prime is 221657273403469. The reversal of 221657273403450 is 54304372756122.

It is a junction number, because it is equal to n+sod(n) for n = 221657273403393 and 221657273403402.

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, 290622529 + ... + 291384228.

It is an arithmetic number, because the mean of its divisors is an integer number (11456803031230).

Almost surely, 2^{221657273403450} is an apocalyptic number.

221657273403450 is an abundant number, since it is smaller than the sum of its proper divisors (328269272095590).

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

221657273403450 is a wasteful number, since it uses less digits than its factorization.

221657273403450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582009311 (or 582009306 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 51.

The spelling of 221657273403450 in words is "two hundred twenty-one trillion, six hundred fifty-seven billion, two hundred seventy-three million, four hundred three thousand, four hundred fifty".