51455070 has 48 divisors (see below), whose sum is σ = 135495360. Its totient is φ = 13545792.

The previous prime is 51455069. The next prime is 51455081. The reversal of 51455070 is 7055415.

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 23 ways as a sum of consecutive naturals, for example, 3492 + ... + 10728.

It is an arithmetic number, because the mean of its divisors is an integer number (2822820).

Almost surely, 2^51455070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51455070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67747680).

51455070 is an abundant number, since it is smaller than the sum of its proper divisors (84040290).

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

51455070 is a wasteful number, since it uses less digits than its factorization.

51455070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7329 (or 7326 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 51455070 is about 7173.2189427063. The cubic root of 51455070 is about 371.9427157717.

The spelling of 51455070 in words is "fifty-one million, four hundred fifty-five thousand, seventy".