51538706 has 16 divisors (see below), whose sum is σ = 79662744. Its totient is φ = 24989184.

The previous prime is 51538693. The next prime is 51538727. The reversal of 51538706 is 60783515.

It can be written as a sum of positive squares in 4 ways, for example, as 45010681 + 6528025 = 6709^2 + 2555^2 .

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 7 ways as a sum of consecutive naturals, for example, 25136 + ... + 27108.

Almost surely, 2^51538706 is an apocalyptic number.

51538706 is a deficient number, since it is larger than the sum of its proper divisors (28124038).

51538706 is a wasteful number, since it uses less digits than its factorization.

51538706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 51538706 is about 7179.0463154934. The cubic root of 51538706 is about 372.1441274874.

The spelling of 51538706 in words is "fifty-one million, five hundred thirty-eight thousand, seven hundred six".