51515001106 has 4 divisors (see below), whose sum is σ = 77272501662. Its totient is φ = 25757500552.

The previous prime is 51515001103. The next prime is 51515001119. The reversal of 51515001106 is 60110051515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60110051515 = 5 ⋅12022010303.

It can be written as a sum of positive squares in only one way, i.e., 51191325025 + 323676081 = 226255^2 + 17991^2 .

It is not an unprimeable number, because it can be changed into a prime (51515001103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12878750275 + ... + 12878750278.

Almost surely, 2^51515001106 is an apocalyptic number.

51515001106 is a deficient number, since it is larger than the sum of its proper divisors (25757500556).

51515001106 is a wasteful number, since it uses less digits than its factorization.

51515001106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25757500555.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 51515001106 in words is "fifty-one billion, five hundred fifteen million, one thousand, one hundred six".