2561220422 has 8 divisors (see below), whose sum is σ = 3842499816. Its totient is φ = 1280387152.

The previous prime is 2561220419. The next prime is 2561220437. The reversal of 2561220422 is 2240221652.

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

It is a junction number, because it is equal to n+sod(n) for n = 2561220391 and 2561220400.

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, 96788 + ... + 120375.

It is an arithmetic number, because the mean of its divisors is an integer number (480312477).

Almost surely, 2^2561220422 is an apocalyptic number.

2561220422 is a deficient number, since it is larger than the sum of its proper divisors (1281279394).

2561220422 is a wasteful number, since it uses less digits than its factorization.

2561220422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223062.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 2561220422 is about 50608.5014794945. The cubic root of 2561220422 is about 1368.1981074170.

The spelling of 2561220422 in words is "two billion, five hundred sixty-one million, two hundred twenty thousand, four hundred twenty-two".