51039101 has 4 divisors (see below), whose sum is σ = 52799100. Its totient is φ = 49279104.

The previous prime is 51039077. The next prime is 51039103. The reversal of 51039101 is 10193015.

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 34798201 + 16240900 = 5899^2 + 4030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51039101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51039103) 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, 879956 + ... + 880013.

It is an arithmetic number, because the mean of its divisors is an integer number (13199775).

Almost surely, 2^51039101 is an apocalyptic number.

It is an amenable number.

51039101 is a deficient number, since it is larger than the sum of its proper divisors (1759999).

51039101 is a wasteful number, since it uses less digits than its factorization.

51039101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759998.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 51039101 is about 7144.1655215987. The cubic root of 51039101 is about 370.9377261232.

The spelling of 51039101 in words is "fifty-one million, thirty-nine thousand, one hundred one".