51822421825 has 24 divisors (see below), whose sum is σ = 67105526400. Its totient is φ = 39624773760.

The previous prime is 51822421823. The next prime is 51822421883. The reversal of 51822421825 is 52812422815.

It is not a de Polignac number, because 51822421825 - 2¹ = 51822421823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51822421823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 724261 + ... + 792589.

It is an arithmetic number, because the mean of its divisors is an integer number (2796063600).

Almost surely, 2^51822421825 is an apocalyptic number.

It is an amenable number.

51822421825 is a deficient number, since it is larger than the sum of its proper divisors (15283104575).

51822421825 is a wasteful number, since it uses less digits than its factorization.

51822421825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69681 (or 69676 counting only the distinct ones).

The product of its digits is 102400, while the sum is 40.

The spelling of 51822421825 in words is "fifty-one billion, eight hundred twenty-two million, four hundred twenty-one thousand, eight hundred twenty-five".