51445421325 has 24 divisors (see below), whose sum is σ = 94507145600. Its totient is φ = 27437557680.

The previous prime is 51445421317. The next prime is 51445421347. The reversal of 51445421325 is 52312454415.

51445421325 is a `hidden beast` number, since 51 + 44 + 542 + 1 + 3 + 25 = 666.

It is not a de Polignac number, because 51445421325 - 2³ = 51445421317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51445421325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38107045 + ... + 38108394.

Almost surely, 2^51445421325 is an apocalyptic number.

It is an amenable number.

51445421325 is a deficient number, since it is larger than the sum of its proper divisors (43061724275).

51445421325 is a wasteful number, since it uses less digits than its factorization.

51445421325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76215458 (or 76215447 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 51445421325 in words is "fifty-one billion, four hundred forty-five million, four hundred twenty-one thousand, three hundred twenty-five".