2055556731 has 8 divisors (see below), whose sum is σ = 2740996944. Its totient is φ = 1370243840.

The previous prime is 2055556709. The next prime is 2055556757. The reversal of 2055556731 is 1376555502.

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

It is a cyclic number.

It is not a de Polignac number, because 2055556731 - 2¹⁸ = 2055294587 is a prime.

It is a super-2 number, since 2×2055556731² = 8450626948718812722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2055556731.

It is not an unprimeable number, because it can be changed into a prime (2055556231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16195 + ... + 66131.

It is an arithmetic number, because the mean of its divisors is an integer number (342624618).

Almost surely, 2^2055556731 is an apocalyptic number.

2055556731 is a deficient number, since it is larger than the sum of its proper divisors (685440213).

2055556731 is a wasteful number, since it uses less digits than its factorization.

2055556731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63661.

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 2055556731 is about 45338.2479921754. The cubic root of 2055556731 is about 1271.4808466690.

The spelling of 2055556731 in words is "two billion, fifty-five million, five hundred fifty-six thousand, seven hundred thirty-one".