2255981620 has 12 divisors (see below), whose sum is σ = 4737561444. Its totient is φ = 902392640.

The previous prime is 2255981593. The next prime is 2255981641. The reversal of 2255981620 is 261895522.

It can be written as a sum of positive squares in 2 ways, for example, as 1533662244 + 722319376 = 39162^2 + 26876^2 .

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, 56399521 + ... + 56399560.

It is an arithmetic number, because the mean of its divisors is an integer number (394796787).

Almost surely, 2^2255981620 is an apocalyptic number.

2255981620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2255981620 is an abundant number, since it is smaller than the sum of its proper divisors (2481579824).

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

2255981620 is a wasteful number, since it uses less digits than its factorization.

2255981620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112799090 (or 112799088 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 2255981620 is about 47497.1748633537. The cubic root of 2255981620 is about 1311.5308754626.

The spelling of 2255981620 in words is "two billion, two hundred fifty-five million, nine hundred eighty-one thousand, six hundred twenty".