51122550 has 48 divisors (see below), whose sum is σ = 127224000. Its totient is φ = 13585440.

The previous prime is 51122549. The next prime is 51122551. The reversal of 51122550 is 5522115.

It is an interprime number because it is at equal distance from previous prime (51122549) and next prime (51122551).

It is a super-2 number, since 2×51122550² = 5227030237005000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51122551) 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 23 ways as a sum of consecutive naturals, for example, 74509 + ... + 75191.

It is an arithmetic number, because the mean of its divisors is an integer number (2650500).

Almost surely, 2^51122550 is an apocalyptic number.

51122550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51122550 is an abundant number, since it is smaller than the sum of its proper divisors (76101450).

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

51122550 is a wasteful number, since it uses less digits than its factorization.

51122550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197 (or 1192 counting only the distinct ones).

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

The square root of 51122550 is about 7150.0034965026. The cubic root of 51122550 is about 371.1397772752.

Adding to 51122550 its reverse (5522115), we get a palindrome (56644665).

The spelling of 51122550 in words is "fifty-one million, one hundred twenty-two thousand, five hundred fifty".