51404807 has 2 divisors, whose sum is σ = 51404808. Its totient is φ = 51404806.

The previous prime is 51404767. The next prime is 51404809. The reversal of 51404807 is 70840415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51404807 - 2¹⁰ = 51403783 is a prime.

Together with 51404809, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51404807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51404809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25702403 + 25702404.

It is an arithmetic number, because the mean of its divisors is an integer number (25702404).

Almost surely, 2^51404807 is an apocalyptic number.

51404807 is a deficient number, since it is larger than the sum of its proper divisors (1).

51404807 is an equidigital number, since it uses as much as digits as its factorization.

51404807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 51404807 is about 7169.7145689351. The cubic root of 51404807 is about 371.8215677014.

The spelling of 51404807 in words is "fifty-one million, four hundred four thousand, eight hundred seven".