51000001061 has 4 divisors (see below), whose sum is σ = 51012713772. Its totient is φ = 50987288352.

The previous prime is 51000001057. The next prime is 51000001081. The reversal of 51000001061 is 16010000015.

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 38919792961 + 12080208100 = 197281^2 + 109910^2 .

It is a cyclic number.

It is not a de Polignac number, because 51000001061 - 2² = 51000001057 is a prime.

It is a super-2 number, since 2×51000001061² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000001081) 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, 6350336 + ... + 6358361.

It is an arithmetic number, because the mean of its divisors is an integer number (12753178443).

Almost surely, 2^51000001061 is an apocalyptic number.

It is an amenable number.

51000001061 is a deficient number, since it is larger than the sum of its proper divisors (12712711).

51000001061 is a wasteful number, since it uses less digits than its factorization.

51000001061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12712710.

The product of its (nonzero) digits is 30, while the sum is 14.

Adding to 51000001061 its reverse (16010000015), we get a palindrome (67010001076).

The spelling of 51000001061 in words is "fifty-one billion, one thousand, sixty-one".