51608205 has 64 divisors (see below), whose sum is σ = 104509440. Its totient is φ = 23918400.

The previous prime is 51608201. The next prime is 51608231. The reversal of 51608205 is 50280615.

51608205 is a `hidden beast` number, since 51 + 608 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 51608205 - 2² = 51608201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51608201) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33400 + ... + 34910.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^51608205 is an apocalyptic number.

51608205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51608205 is an abundant number, since it is smaller than the sum of its proper divisors (52901235).

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

51608205 is a wasteful number, since it uses less digits than its factorization.

51608205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51608205 is about 7183.8850909518. The cubic root of 51608205 is about 372.3113288646.

The spelling of 51608205 in words is "fifty-one million, six hundred eight thousand, two hundred five".