5561212005 has 64 divisors (see below), whose sum is σ = 10036995840. Its totient is φ = 2921184000.

The previous prime is 5561212001. The next prime is 5561212039. The reversal of 5561212005 is 5002121655.

It is not a de Polignac number, because 5561212005 - 2² = 5561212001 is a prime.

It is a super-2 number, since 2×5561212005² = 61854157929112240050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 5561212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561212001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2876019 + ... + 2877951.

It is an arithmetic number, because the mean of its divisors is an integer number (156828060).

Almost surely, 2^5561212005 is an apocalyptic number.

It is an amenable number.

5561212005 is a deficient number, since it is larger than the sum of its proper divisors (4475783835).

5561212005 is a wasteful number, since it uses less digits than its factorization.

5561212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259 (or 2253 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 5561212005 is about 74573.5342128828. The cubic root of 5561212005 is about 1771.6984988657.

The spelling of 5561212005 in words is "five billion, five hundred sixty-one million, two hundred twelve thousand, five".