51566011 has 4 divisors (see below), whose sum is σ = 58932592. Its totient is φ = 44199432.

The previous prime is 51565967. The next prime is 51566027. The reversal of 51566011 is 11066515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51566011 - 2⁷ = 51565883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51566041) 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, 3683280 + ... + 3683293.

It is an arithmetic number, because the mean of its divisors is an integer number (14733148).

Almost surely, 2^51566011 is an apocalyptic number.

51566011 is a deficient number, since it is larger than the sum of its proper divisors (7366581).

51566011 is an equidigital number, since it uses as much as digits as its factorization.

51566011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366580.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51566011 is about 7180.9477786710. The cubic root of 51566011 is about 372.2098360407.

The spelling of 51566011 in words is "fifty-one million, five hundred sixty-six thousand, eleven".