2500211805 has 128 divisors (see below), whose sum is σ = 5225472000. Its totient is φ = 991263744.

The previous prime is 2500211797. The next prime is 2500211839. The reversal of 2500211805 is 5081120052.

It is not a de Polignac number, because 2500211805 - 2³ = 2500211797 is a prime.

It is a super-2 number, since 2×2500211805² = 12502118139722716050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3863992 + ... + 3864638.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000).

Almost surely, 2^2500211805 is an apocalyptic number.

It is an amenable number.

2500211805 is an abundant number, since it is smaller than the sum of its proper divisors (2725260195).

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

2500211805 is a wasteful number, since it uses less digits than its factorization.

2500211805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 2500211805 is about 50002.1180051405. The cubic root of 2500211805 is about 1357.2471356966.

Adding to 2500211805 its reverse (5081120052), we get a palindrome (7581331857).

The spelling of 2500211805 in words is "two billion, five hundred million, two hundred eleven thousand, eight hundred five".