51025252051 has 4 divisors (see below), whose sum is σ = 51027127272. Its totient is φ = 51023376832.

The previous prime is 51025252049. The next prime is 51025252081. The reversal of 51025252051 is 15025252015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15025252015 = 5 ⋅3005050403.

It is a cyclic number.

It is not a de Polignac number, because 51025252051 - 2¹ = 51025252049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51025252081) 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, 896185 + ... + 951418.

It is an arithmetic number, because the mean of its divisors is an integer number (12756781818).

Almost surely, 2^51025252051 is an apocalyptic number.

51025252051 is a deficient number, since it is larger than the sum of its proper divisors (1875221).

51025252051 is a wasteful number, since it uses less digits than its factorization.

51025252051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875220.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 51025252051 in words is "fifty-one billion, twenty-five million, two hundred fifty-two thousand, fifty-one".