2055556501 has 4 divisors (see below), whose sum is σ = 2071247904. Its totient is φ = 2039865100.

The previous prime is 2055556499. The next prime is 2055556543. The reversal of 2055556501 is 1056555502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2055556501 - 2¹ = 2055556499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2055551501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7845505 + ... + 7845766.

It is an arithmetic number, because the mean of its divisors is an integer number (517811976).

Almost surely, 2^2055556501 is an apocalyptic number.

It is an amenable number.

2055556501 is a deficient number, since it is larger than the sum of its proper divisors (15691403).

2055556501 is a wasteful number, since it uses less digits than its factorization.

2055556501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15691402.

The product of its (nonzero) digits is 37500, while the sum is 34.

The square root of 2055556501 is about 45338.2454556856. The cubic root of 2055556501 is about 1271.4807992463.

Subtracting from 2055556501 its reverse (1056555502), we obtain a palindrome (999000999).

The spelling of 2055556501 in words is "two billion, fifty-five million, five hundred fifty-six thousand, five hundred one".