51481858 has 8 divisors (see below), whose sum is σ = 77487228. Its totient is φ = 25652784.

The previous prime is 51481853. The next prime is 51481861. The reversal of 51481858 is 85818415.

It can be written as a sum of positive squares in 2 ways, for example, as 51451929 + 29929 = 7173^2 + 173^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51481858.

It is not an unprimeable number, because it can be changed into a prime (51481853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43341 + ... + 44512.

Almost surely, 2^51481858 is an apocalyptic number.

51481858 is a deficient number, since it is larger than the sum of its proper divisors (26005370).

51481858 is a wasteful number, since it uses less digits than its factorization.

51481858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88148.

The product of its digits is 51200, while the sum is 40.

The square root of 51481858 is about 7175.0859228305. The cubic root of 51481858 is about 372.0072502152.

The spelling of 51481858 in words is "fifty-one million, four hundred eighty-one thousand, eight hundred fifty-eight".