222561042 has 64 divisors (see below), whose sum is σ = 516668544. Its totient is φ = 63165440.

The previous prime is 222561029. The next prime is 222561043. The reversal of 222561042 is 240165222.

It is a happy number.

It is a super-2 number, since 2×222561042² = 99066834832251528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222561043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328408 + ... + 329084.

It is an arithmetic number, because the mean of its divisors is an integer number (8072946).

Almost surely, 2^222561042 is an apocalyptic number.

222561042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 222561042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258334272).

222561042 is an abundant number, since it is smaller than the sum of its proper divisors (294107502).

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

222561042 is a wasteful number, since it uses less digits than its factorization.

222561042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 222561042 is about 14918.4798823473. The cubic root of 222561042 is about 606.0145461550.

The spelling of 222561042 in words is "two hundred twenty-two million, five hundred sixty-one thousand, forty-two".