51540322 has 16 divisors (see below), whose sum is σ = 78158520. Its totient is φ = 25489408.

The previous prime is 51540289. The next prime is 51540329. The reversal of 51540322 is 22304515.

It can be written as a sum of positive squares in 4 ways, for example, as 42653961 + 8886361 = 6531^2 + 2981^2 .

It is a junction number, because it is equal to n+sod(n) for n = 51540293 and 51540302.

It is not an unprimeable number, because it can be changed into a prime (51540329) by changing a digit.

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, 101004 + ... + 101512.

Almost surely, 2^51540322 is an apocalyptic number.

51540322 is a deficient number, since it is larger than the sum of its proper divisors (26618198).

51540322 is a wasteful number, since it uses less digits than its factorization.

51540322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51540322 is about 7179.1588643796. The cubic root of 51540322 is about 372.1480169824.

Adding to 51540322 its reverse (22304515), we get a palindrome (73844837).

The spelling of 51540322 in words is "fifty-one million, five hundred forty thousand, three hundred twenty-two".