51427805 has 32 divisors (see below), whose sum is σ = 76785408. Its totient is φ = 32486400.

The previous prime is 51427799. The next prime is 51427811. The reversal of 51427805 is 50872415.

It is an interprime number because it is at equal distance from previous prime (51427799) and next prime (51427811).

It is not a de Polignac number, because 51427805 - 2⁶ = 51427741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10040 + ... + 14270.

It is an arithmetic number, because the mean of its divisors is an integer number (2399544).

Almost surely, 2^51427805 is an apocalyptic number.

51427805 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51427805 is a deficient number, since it is larger than the sum of its proper divisors (25357603).

51427805 is a wasteful number, since it uses less digits than its factorization.

51427805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51427805 is about 7171.3182191282. The cubic root of 51427805 is about 371.8770091928.

The spelling of 51427805 in words is "fifty-one million, four hundred twenty-seven thousand, eight hundred five".