51856011 has 8 divisors (see below), whose sum is σ = 76823760. Its totient is φ = 34570656.

The previous prime is 51855989. The next prime is 51856033. The reversal of 51856011 is 11065815.

51856011 is a `hidden beast` number, since 51 + 8 + 5 + 601 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (51855989) and next prime (51856033).

It is not a de Polignac number, because 51856011 - 2⁹ = 51855499 is a prime.

It is a super-3 number, since 3×51856011³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1920593 = 51856011 / (5 + 1 + 8 + 5 + 6 + 0 + 1 + 1).

It is not an unprimeable number, because it can be changed into a prime (51856081) 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, 960270 + ... + 960323.

It is an arithmetic number, because the mean of its divisors is an integer number (9602970).

Almost surely, 2^51856011 is an apocalyptic number.

51856011 is a deficient number, since it is larger than the sum of its proper divisors (24967749).

51856011 is a wasteful number, since it uses less digits than its factorization.

51856011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920602 (or 1920596 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 51856011 is about 7201.1117891614. Note that the first 3 decimals coincide. The cubic root of 51856011 is about 372.9062840314.

The spelling of 51856011 in words is "fifty-one million, eight hundred fifty-six thousand, eleven".