51989146 has 16 divisors (see below), whose sum is σ = 85186080. Its totient is φ = 23600080.

The previous prime is 51989123. The next prime is 51989159. The reversal of 51989146 is 64198915.

51989146 = 2169² + 2170² + ... + 2179².

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26760 + ... + 28636.

It is an arithmetic number, because the mean of its divisors is an integer number (5324130).

Almost surely, 2^51989146 is an apocalyptic number.

51989146 is a deficient number, since it is larger than the sum of its proper divisors (33196934).

51989146 is a wasteful number, since it uses less digits than its factorization.

51989146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149.

The product of its digits is 77760, while the sum is 43.

The square root of 51989146 is about 7210.3499221605. The cubic root of 51989146 is about 373.2251442105.

The spelling of 51989146 in words is "fifty-one million, nine hundred eighty-nine thousand, one hundred forty-six".