261325222 has 4 divisors (see below), whose sum is σ = 391987836. Its totient is φ = 130662610.

The previous prime is 261325189. The next prime is 261325231. The reversal of 261325222 is 222523162.

It is a happy number.

261325222 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: 222523162 = 2 ⋅111261581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65331304 + ... + 65331307.

It is an arithmetic number, because the mean of its divisors is an integer number (97996959).

Almost surely, 2^261325222 is an apocalyptic number.

261325222 is a deficient number, since it is larger than the sum of its proper divisors (130662614).

261325222 is a wasteful number, since it uses less digits than its factorization.

261325222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130662613.

The product of its digits is 2880, while the sum is 25.

The square root of 261325222 is about 16165.5566560512. The cubic root of 261325222 is about 639.3329818224.

Adding to 261325222 its reverse (222523162), we get a palindrome (483848384).

The spelling of 261325222 in words is "two hundred sixty-one million, three hundred twenty-five thousand, two hundred twenty-two".