222501428 has 6 divisors (see below), whose sum is σ = 389377506. Its totient is φ = 111250712.

The previous prime is 222501421. The next prime is 222501437. The reversal of 222501428 is 824105222.

222501428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 83685904 = 11782^2 + 9148^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222501397 and 222501406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222501421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27812675 + ... + 27812682.

It is an arithmetic number, because the mean of its divisors is an integer number (64896251).

Almost surely, 2^222501428 is an apocalyptic number.

It is an amenable number.

222501428 is a deficient number, since it is larger than the sum of its proper divisors (166876078).

222501428 is a wasteful number, since it uses less digits than its factorization.

222501428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55625361 (or 55625359 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 222501428 is about 14916.4817567682. The cubic root of 222501428 is about 605.9604333943.

The spelling of 222501428 in words is "two hundred twenty-two million, five hundred one thousand, four hundred twenty-eight".