51355206 has 48 divisors (see below), whose sum is σ = 130279968. Its totient is φ = 14313600.

The previous prime is 51355153. The next prime is 51355207. The reversal of 51355206 is 60255315.

51355206 is a `hidden beast` number, since 5 + 135 + 520 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51355206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51355207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196 + ... + 10136.

It is an arithmetic number, because the mean of its divisors is an integer number (2714166).

Almost surely, 2^51355206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51355206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65139984).

51355206 is an abundant number, since it is smaller than the sum of its proper divisors (78924762).

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

51355206 is a wasteful number, since it uses less digits than its factorization.

51355206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9997 (or 9994 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 51355206 is about 7166.2546703281. The cubic root of 51355206 is about 371.7019377959.

The spelling of 51355206 in words is "fifty-one million, three hundred fifty-five thousand, two hundred six".