51025221053 has 4 divisors (see below), whose sum is σ = 51397668060. Its totient is φ = 50652774048.

The previous prime is 51025221041. The next prime is 51025221059. The reversal of 51025221053 is 35012252015.

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 21095529049 + 29929692004 = 145243^2 + 173002^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025221053 - 2⁸ = 51025220797 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 (51025221059) 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, 186223298 + ... + 186223571.

It is an arithmetic number, because the mean of its divisors is an integer number (12849417015).

Almost surely, 2^51025221053 is an apocalyptic number.

It is an amenable number.

51025221053 is a deficient number, since it is larger than the sum of its proper divisors (372447007).

51025221053 is a wasteful number, since it uses less digits than its factorization.

51025221053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372447006.

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 51025221053 its reverse (35012252015), we get a palindrome (86037473068).

The spelling of 51025221053 in words is "fifty-one billion, twenty-five million, two hundred twenty-one thousand, fifty-three".