51505122 has 8 divisors (see below), whose sum is σ = 103010256. Its totient is φ = 17168372.

The previous prime is 51505109. The next prime is 51505123. The reversal of 51505122 is 22150515.

It is a sphenic number, since it is the product of 3 distinct primes.

51505122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (51505123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4292088 + ... + 4292099.

It is an arithmetic number, because the mean of its divisors is an integer number (12876282).

Almost surely, 2^51505122 is an apocalyptic number.

51505122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51505122 is a wasteful number, since it uses less digits than its factorization.

51505122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8584192.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51505122 is about 7176.7069049809. The cubic root of 51505122 is about 372.0632768994.

Adding to 51505122 its reverse (22150515), we get a palindrome (73655637).

The spelling of 51505122 in words is "fifty-one million, five hundred five thousand, one hundred twenty-two".