51551155425 has 48 divisors (see below), whose sum is σ = 106262341632. Its totient is φ = 21423854400.

The previous prime is 51551155387. The next prime is 51551155457. The reversal of 51551155425 is 52455115515.

It is not a de Polignac number, because 51551155425 - 2¹⁰ = 51551154401 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4457529 + ... + 4469078.

It is an arithmetic number, because the mean of its divisors is an integer number (2213798784).

Almost surely, 2^51551155425 is an apocalyptic number.

51551155425 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51551155425 is an abundant number, since it is smaller than the sum of its proper divisors (54711186207).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51551155425 is a wasteful number, since it uses less digits than its factorization.

51551155425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8926638 (or 8926633 counting only the distinct ones).

The product of its digits is 125000, while the sum is 39.

The spelling of 51551155425 in words is "fifty-one billion, five hundred fifty-one million, one hundred fifty-five thousand, four hundred twenty-five".