2145222240056 has 32 divisors (see below), whose sum is σ = 4674818448000. Its totient is φ = 903798230496.

The previous prime is 2145222240011. The next prime is 2145222240103. The reversal of 2145222240056 is 6500422225412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2145222239998 and 2145222240025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324636866 + ... + 324643473.

It is an arithmetic number, because the mean of its divisors is an integer number (146088076500).

Almost surely, 2^{2145222240056} is an apocalyptic number.

It is an amenable number.

2145222240056 is an abundant number, since it is smaller than the sum of its proper divisors (2529596207944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145222240056 is a wasteful number, since it uses less digits than its factorization.

2145222240056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649280411 (or 649280407 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 2145222240056 its reverse (6500422225412), we get a palindrome (8645644465468).

The spelling of 2145222240056 in words is "two trillion, one hundred forty-five billion, two hundred twenty-two million, two hundred forty thousand, fifty-six".