51866802 has 24 divisors (see below), whose sum is σ = 121023084. Its totient is φ = 15958944.

The previous prime is 51866791. The next prime is 51866809. The reversal of 51866802 is 20866815.

It is a happy number.

51866802 is a `hidden beast` number, since 518 + 66 + 80 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42263001 + 9603801 = 6501^2 + 3099^2 .

It is not an unprimeable number, because it can be changed into a prime (51866809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110593 + ... + 111060.

Almost surely, 2^51866802 is an apocalyptic number.

51866802 is an abundant number, since it is smaller than the sum of its proper divisors (69156282).

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

51866802 is a wasteful number, since it uses less digits than its factorization.

51866802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221674 (or 221671 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 51866802 is about 7201.8610094891. The cubic root of 51866802 is about 372.9321489378.

The spelling of 51866802 in words is "fifty-one million, eight hundred sixty-six thousand, eight hundred two".