51274805 has 16 divisors (see below), whose sum is σ = 66742704. Its totient is φ = 37662720.

The previous prime is 51274801. The next prime is 51274807. The reversal of 51274805 is 50847215.

It can be written as a sum of positive squares in 8 ways, for example, as 323761 + 50951044 = 569^2 + 7138^2 .

It is not a de Polignac number, because 51274805 - 2² = 51274801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51274801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3872 + ... + 10841.

It is an arithmetic number, because the mean of its divisors is an integer number (4171419).

Almost surely, 2^51274805 is an apocalyptic number.

It is an amenable number.

51274805 is a deficient number, since it is larger than the sum of its proper divisors (15467899).

51274805 is a wasteful number, since it uses less digits than its factorization.

51274805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14776.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51274805 is about 7160.6427784103. The cubic root of 51274805 is about 371.5078593414.

The spelling of 51274805 in words is "fifty-one million, two hundred seventy-four thousand, eight hundred five".