222451261 has 4 divisors (see below), whose sum is σ = 222500124. Its totient is φ = 222402400.

The previous prime is 222451253. The next prime is 222451267. The reversal of 222451261 is 162154222.

222451261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162154222 = 2 ⋅81077111.

It can be written as a sum of positive squares in 2 ways, for example, as 142348761 + 80102500 = 11931^2 + 8950^2 .

It is a cyclic number.

It is not a de Polignac number, because 222451261 - 2³ = 222451253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222451267) 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, 16810 + ... + 26971.

It is an arithmetic number, because the mean of its divisors is an integer number (55625031).

Almost surely, 2^222451261 is an apocalyptic number.

It is an amenable number.

222451261 is a deficient number, since it is larger than the sum of its proper divisors (48863).

222451261 is an equidigital number, since it uses as much as digits as its factorization.

222451261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48862.

The product of its digits is 1920, while the sum is 25.

The square root of 222451261 is about 14914.8000657065. The cubic root of 222451261 is about 605.9148883652.

The spelling of 222451261 in words is "two hundred twenty-two million, four hundred fifty-one thousand, two hundred sixty-one".