56212005 has 16 divisors (see below), whose sum is σ = 93041280. Its totient is φ = 28945728.

The previous prime is 56211997. The next prime is 56212019. The reversal of 56212005 is 50021265.

It is not a de Polignac number, because 56212005 - 2³ = 56211997 is a prime.

It is a super-2 number, since 2×56212005² = 6319579012240050, 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 15 ways as a sum of consecutive naturals, for example, 64177 + ... + 65046.

It is an arithmetic number, because the mean of its divisors is an integer number (5815080).

Almost surely, 2^56212005 is an apocalyptic number.

It is an amenable number.

56212005 is a deficient number, since it is larger than the sum of its proper divisors (36829275).

56212005 is a wasteful number, since it uses less digits than its factorization.

56212005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129260.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 56212005 is about 7497.4665721162. The cubic root of 56212005 is about 383.0684273525.

It can be divided in two parts, 5621 and 2005, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 56212005 in words is "fifty-six million, two hundred twelve thousand, five".