51402205 has 4 divisors (see below), whose sum is σ = 61682652. Its totient is φ = 41121760.

The previous prime is 51402193. The next prime is 51402251. The reversal of 51402205 is 50220415.

51402205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16426809 + 34975396 = 4053^2 + 5914^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51402205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5140216 + ... + 5140225.

It is an arithmetic number, because the mean of its divisors is an integer number (15420663).

Almost surely, 2^51402205 is an apocalyptic number.

It is an amenable number.

51402205 is a deficient number, since it is larger than the sum of its proper divisors (10280447).

51402205 is a wasteful number, since it uses less digits than its factorization.

51402205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280446.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 51402205 is about 7169.5331089270. The cubic root of 51402205 is about 371.8152939947.

The spelling of 51402205 in words is "fifty-one million, four hundred two thousand, two hundred five".