261202561222 has 8 divisors (see below), whose sum is σ = 393792694416. Its totient is φ = 129938329752.

The previous prime is 261202561187. The next prime is 261202561247. The reversal of 261202561222 is 222165202162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331474938 + ... + 331475725.

It is an arithmetic number, because the mean of its divisors is an integer number (49224086802).

Almost surely, 2^261202561222 is an apocalyptic number.

261202561222 is a deficient number, since it is larger than the sum of its proper divisors (132590133194).

261202561222 is a wasteful number, since it uses less digits than its factorization.

261202561222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662950862.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 261202561222 its reverse (222165202162), we get a palindrome (483367763384).

The spelling of 261202561222 in words is "two hundred sixty-one billion, two hundred two million, five hundred sixty-one thousand, two hundred twenty-two".