51725478 has 24 divisors (see below), whose sum is σ = 120341592. Its totient is φ = 14778624.

The previous prime is 51725461. The next prime is 51725489. The reversal of 51725478 is 87452715.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87675 + ... + 88262.

It is an arithmetic number, because the mean of its divisors is an integer number (5014233).

Almost surely, 2^51725478 is an apocalyptic number.

51725478 is an abundant number, since it is smaller than the sum of its proper divisors (68616114).

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

51725478 is a wasteful number, since it uses less digits than its factorization.

51725478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175956 (or 175949 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 51725478 is about 7192.0426861915. The cubic root of 51725478 is about 372.5931253736.

The spelling of 51725478 in words is "fifty-one million, seven hundred twenty-five thousand, four hundred seventy-eight".