51406650 has 72 divisors (see below), whose sum is σ = 143261664. Its totient is φ = 13705200.

The previous prime is 51406637. The next prime is 51406651. The reversal of 51406650 is 5660415.

It is a happy number.

51406650 is a `hidden beast` number, since 5 + 1 + 4 + 0 + 6 + 650 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (51406651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10035 + ... + 14265.

Almost surely, 2^51406650 is an apocalyptic number.

51406650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51406650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71630832).

51406650 is an abundant number, since it is smaller than the sum of its proper divisors (91855014).

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

51406650 is a wasteful number, since it uses less digits than its factorization.

51406650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4258 (or 4241 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 51406650 is about 7169.8430945175. The cubic root of 51406650 is about 371.8260112480.

The spelling of 51406650 in words is "fifty-one million, four hundred six thousand, six hundred fifty".