51061857 has 16 divisors (see below), whose sum is σ = 84882432. Its totient is φ = 26525520.

The previous prime is 51061847. The next prime is 51061859. The reversal of 51061857 is 75816015.

It is not a de Polignac number, because 51061857 - 2⁶ = 51061793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (51061859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110293 + ... + 110754.

It is an arithmetic number, because the mean of its divisors is an integer number (5305152).

Almost surely, 2^51061857 is an apocalyptic number.

It is an amenable number.

51061857 is a deficient number, since it is larger than the sum of its proper divisors (33820575).

51061857 is a wasteful number, since it uses less digits than its factorization.

51061857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221068.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 51061857 is about 7145.7579723917. The cubic root of 51061857 is about 370.9928459859.

The spelling of 51061857 in words is "fifty-one million, sixty-one thousand, eight hundred fifty-seven".