222451780 has 12 divisors (see below), whose sum is σ = 467148780. Its totient is φ = 88980704.

The previous prime is 222451777. The next prime is 222451787. The reversal of 222451780 is 87154222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 93083904 + 129367876 = 9648^2 + 11374^2 .

It is not an unprimeable number, because it can be changed into a prime (222451787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5561275 + ... + 5561314.

It is an arithmetic number, because the mean of its divisors is an integer number (38929065).

Almost surely, 2^222451780 is an apocalyptic number.

222451780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222451780 is an abundant number, since it is smaller than the sum of its proper divisors (244697000).

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

222451780 is a wasteful number, since it uses less digits than its factorization.

222451780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122598 (or 11122596 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 222451780 is about 14914.8174645216. The cubic root of 222451780 is about 605.9153595839.

It can be divided in two parts, 22245 and 1780, that added together give a square (24025 = 155²).

The spelling of 222451780 in words is "two hundred twenty-two million, four hundred fifty-one thousand, seven hundred eighty".