51897858 has 16 divisors (see below), whose sum is σ = 104963040. Its totient is φ = 17104736.

The previous prime is 51897851. The next prime is 51897863. The reversal of 51897858 is 85879815.

It is a self number, because there is not a number n which added to its sum of digits gives 51897858.

It is not an unprimeable number, because it can be changed into a prime (51897851) 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, 48060 + ... + 49127.

It is an arithmetic number, because the mean of its divisors is an integer number (6560190).

Almost surely, 2^51897858 is an apocalyptic number.

51897858 is an abundant number, since it is smaller than the sum of its proper divisors (53065182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51897858 is a wasteful number, since it uses less digits than its factorization.

51897858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97281.

The product of its digits is 806400, while the sum is 51.

The square root of 51897858 is about 7204.0167962047. The cubic root of 51897858 is about 373.0065669313.

The spelling of 51897858 in words is "fifty-one million, eight hundred ninety-seven thousand, eight hundred fifty-eight".