51506322 has 16 divisors (see below), whose sum is σ = 117728832. Its totient is φ = 14716080.

The previous prime is 51506309. The next prime is 51506327. The reversal of 51506322 is 22360515.

It is a junction number, because it is equal to n+sod(n) for n = 51506292 and 51506301.

It is not an unprimeable number, because it can be changed into a prime (51506327) 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, 613129 + ... + 613212.

It is an arithmetic number, because the mean of its divisors is an integer number (7358052).

Almost surely, 2^51506322 is an apocalyptic number.

51506322 is an abundant number, since it is smaller than the sum of its proper divisors (66222510).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51506322 is a wasteful number, since it uses less digits than its factorization.

51506322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226353.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51506322 is about 7176.7905082983. The cubic root of 51506322 is about 372.0661664014.

Adding to 51506322 its reverse (22360515), we get a palindrome (73866837).

The spelling of 51506322 in words is "fifty-one million, five hundred six thousand, three hundred twenty-two".