221925496460 has 48 divisors (see below), whose sum is σ = 467475563520. Its totient is φ = 88497826560.

The previous prime is 221925496459. The next prime is 221925496469. The reversal of 221925496460 is 64694529122.

It is a junction number, because it is equal to n+sod(n) for n = 221925496399 and 221925496408.

It is not an unprimeable number, because it can be changed into a prime (221925496469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9567797 + ... + 9590963.

It is an arithmetic number, because the mean of its divisors is an integer number (9739074240).

Almost surely, 2^221925496460 is an apocalyptic number.

221925496460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221925496460 is an abundant number, since it is smaller than the sum of its proper divisors (245550067060).

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

221925496460 is a wasteful number, since it uses less digits than its factorization.

221925496460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24626 (or 24624 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 50.

The spelling of 221925496460 in words is "two hundred twenty-one billion, nine hundred twenty-five million, four hundred ninety-six thousand, four hundred sixty".