51665104 has 20 divisors (see below), whose sum is σ = 105370240. Its totient is φ = 24472800.

The previous prime is 51665101. The next prime is 51665111. The reversal of 51665104 is 40156615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51665101) 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, 84672 + ... + 85279.

It is an arithmetic number, because the mean of its divisors is an integer number (5268512).

Almost surely, 2^51665104 is an apocalyptic number.

It is an amenable number.

51665104 is an abundant number, since it is smaller than the sum of its proper divisors (53705136).

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

51665104 is a wasteful number, since it uses less digits than its factorization.

51665104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169978 (or 169972 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51665104 is about 7187.8441830635. The cubic root of 51665104 is about 372.4481053181.

The spelling of 51665104 in words is "fifty-one million, six hundred sixty-five thousand, one hundred four".