221925126 has 32 divisors (see below), whose sum is σ = 451443456. Its totient is φ = 72716000.

The previous prime is 221925101. The next prime is 221925133. The reversal of 221925126 is 621529122.

221925126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221925093 and 221925102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208636 + ... + 209696.

It is an arithmetic number, because the mean of its divisors is an integer number (14107608).

Almost surely, 2^221925126 is an apocalyptic number.

221925126 is an abundant number, since it is smaller than the sum of its proper divisors (229518330).

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

221925126 is a wasteful number, since it uses less digits than its factorization.

221925126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628.

The product of its digits is 4320, while the sum is 30.

The square root of 221925126 is about 14897.1516069348. The cubic root of 221925126 is about 605.4368140635.

The spelling of 221925126 in words is "two hundred twenty-one million, nine hundred twenty-five thousand, one hundred twenty-six".