51245806 has 16 divisors (see below), whose sum is σ = 78781248. Its totient is φ = 24991200.

The previous prime is 51245801. The next prime is 51245819. The reversal of 51245806 is 60854215.

It is a super-2 number, since 2×51245806² = 5252265265179272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17851 + ... + 20521.

It is an arithmetic number, because the mean of its divisors is an integer number (4923828).

Almost surely, 2^51245806 is an apocalyptic number.

51245806 is a deficient number, since it is larger than the sum of its proper divisors (27535442).

51245806 is a wasteful number, since it uses less digits than its factorization.

51245806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 51245806 is about 7158.6176039791. The cubic root of 51245806 is about 371.4378094208.

The spelling of 51245806 in words is "fifty-one million, two hundred forty-five thousand, eight hundred six".