222551401 has 2 divisors, whose sum is σ = 222551402. Its totient is φ = 222551400.

The previous prime is 222551383. The next prime is 222551447. The reversal of 222551401 is 104155222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178195801 + 44355600 = 13349^2 + 6660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222551401 is a prime.

It is not a weakly prime, because it can be changed into another prime (222351401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111275700 + 111275701.

It is an arithmetic number, because the mean of its divisors is an integer number (111275701).

Almost surely, 2^222551401 is an apocalyptic number.

It is an amenable number.

222551401 is a deficient number, since it is larger than the sum of its proper divisors (1).

222551401 is an equidigital number, since it uses as much as digits as its factorization.

222551401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 222551401 is about 14918.1567561143. The cubic root of 222551401 is about 606.0057954911.

The spelling of 222551401 in words is "two hundred twenty-two million, five hundred fifty-one thousand, four hundred one".