51244505 has 8 divisors (see below), whose sum is σ = 66223752. Its totient is φ = 37842048.

The previous prime is 51244493. The next prime is 51244507. The reversal of 51244505 is 50544215.

It can be written as a sum of positive squares in 4 ways, for example, as 364816 + 50879689 = 604^2 + 7133^2 .

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 51244505 - 2¹⁸ = 50982361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51244507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394124 + ... + 394253.

It is an arithmetic number, because the mean of its divisors is an integer number (8277969).

Almost surely, 2^51244505 is an apocalyptic number.

It is an amenable number.

51244505 is a deficient number, since it is larger than the sum of its proper divisors (14979247).

51244505 is a wasteful number, since it uses less digits than its factorization.

51244505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788395.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51244505 is about 7158.5267339027. The cubic root of 51244505 is about 371.4346661088.

The spelling of 51244505 in words is "fifty-one million, two hundred forty-four thousand, five hundred five".