51445505 has 8 divisors (see below), whose sum is σ = 61789992. Its totient is φ = 41119488.

The previous prime is 51445487. The next prime is 51445517. The reversal of 51445505 is 50554415.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15241216 + 36204289 = 3904^2 + 6017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51445505 - 2¹⁴ = 51429121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2519 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (7723749).

Almost surely, 2^51445505 is an apocalyptic number.

It is an amenable number.

51445505 is a deficient number, since it is larger than the sum of its proper divisors (10344487).

51445505 is a wasteful number, since it uses less digits than its factorization.

51445505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9235.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 51445505 is about 7172.5521956971. The cubic root of 51445505 is about 371.9196674920.

The spelling of 51445505 in words is "fifty-one million, four hundred forty-five thousand, five hundred five".