51404777 has 4 divisors (see below), whose sum is σ = 51432516. Its totient is φ = 51377040.

The previous prime is 51404767. The next prime is 51404807. The reversal of 51404777 is 77740415.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15452761 + 35952016 = 3931^2 + 5996^2 .

It is a cyclic number.

It is not a de Polignac number, because 51404777 - 2⁶ = 51404713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51404707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10874 + ... + 14867.

It is an arithmetic number, because the mean of its divisors is an integer number (12858129).

Almost surely, 2^51404777 is an apocalyptic number.

It is an amenable number.

51404777 is a deficient number, since it is larger than the sum of its proper divisors (27739).

51404777 is a wasteful number, since it uses less digits than its factorization.

51404777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27738.

The product of its (nonzero) digits is 27440, while the sum is 35.

The square root of 51404777 is about 7169.7124768013. The cubic root of 51404777 is about 371.8214953693.

The spelling of 51404777 in words is "fifty-one million, four hundred four thousand, seven hundred seventy-seven".