51469986 has 8 divisors (see below), whose sum is σ = 102939984. Its totient is φ = 17156660.

The previous prime is 51469973. The next prime is 51470009. The reversal of 51469986 is 68996415.

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

51469986 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289160 + ... + 4289171.

It is an arithmetic number, because the mean of its divisors is an integer number (12867498).

Almost surely, 2^51469986 is an apocalyptic number.

51469986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51469986 is a wasteful number, since it uses less digits than its factorization.

51469986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578336.

The product of its digits is 466560, while the sum is 48.

The square root of 51469986 is about 7174.2585679637. The cubic root of 51469986 is about 371.9786523765.

It can be divided in two parts, 514 and 69986, that added together give a triangular number (70500 = T₃₇₅).

The spelling of 51469986 in words is "fifty-one million, four hundred sixty-nine thousand, nine hundred eighty-six".