2045555401 has 4 divisors (see below), whose sum is σ = 2048925952. Its totient is φ = 2042184852.

The previous prime is 2045555389. The next prime is 2045555417. The reversal of 2045555401 is 1045555402.

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 2045555401 - 2¹¹ = 2045553353 is a prime.

It is a super-3 number, since 3×2045555401³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045555431) 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, 1684365 + ... + 1685578.

It is an arithmetic number, because the mean of its divisors is an integer number (512231488).

Almost surely, 2^2045555401 is an apocalyptic number.

It is an amenable number.

2045555401 is a deficient number, since it is larger than the sum of its proper divisors (3370551).

2045555401 is an equidigital number, since it uses as much as digits as its factorization.

2045555401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370550.

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 2045555401 is about 45227.8166729282. The cubic root of 2045555401 is about 1269.4153592749.

Subtracting from 2045555401 its reverse (1045555402), we obtain a palindrome (999999999).

The spelling of 2045555401 in words is "two billion, forty-five million, five hundred fifty-five thousand, four hundred one".