51168802 has 4 divisors (see below), whose sum is σ = 76753206. Its totient is φ = 25584400.

The previous prime is 51168781. The next prime is 51168809. The reversal of 51168802 is 20886115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38700841 + 12467961 = 6221^2 + 3531^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51168809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12792199 + ... + 12792202.

Almost surely, 2^51168802 is an apocalyptic number.

51168802 is a deficient number, since it is larger than the sum of its proper divisors (25584404).

51168802 is a wasteful number, since it uses less digits than its factorization.

51168802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25584403.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 51168802 is about 7153.2371692822. The cubic root of 51168802 is about 371.2516703814.

The spelling of 51168802 in words is "fifty-one million, one hundred sixty-eight thousand, eight hundred two".