51154857 has 24 divisors (see below), whose sum is σ = 79843400. Its totient is φ = 31373568.

The previous prime is 51154837. The next prime is 51154871. The reversal of 51154857 is 75845115.

51154857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8696601 + 42458256 = 2949^2 + 6516^2 .

It is not a de Polignac number, because 51154857 - 2¹¹ = 51152809 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51154837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47319 + ... + 48387.

Almost surely, 2^51154857 is an apocalyptic number.

It is an amenable number.

51154857 is a deficient number, since it is larger than the sum of its proper divisors (28688543).

51154857 is a wasteful number, since it uses less digits than its factorization.

51154857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1494 counting only the distinct ones).

The product of its digits is 28000, while the sum is 36.

The square root of 51154857 is about 7152.2623693486. The cubic root of 51154857 is about 371.2179416592.

The spelling of 51154857 in words is "fifty-one million, one hundred fifty-four thousand, eight hundred fifty-seven".