51225534 has 40 divisors (see below), whose sum is σ = 115483368. Its totient is φ = 16971120.

The previous prime is 51225529. The next prime is 51225557. The reversal of 51225534 is 43552215.

It is a happy number.

51225534 is a `hidden beast` number, since 5 + 122 + 5 + 534 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51225498 and 51225507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28449 + ... + 30195.

Almost surely, 2^51225534 is an apocalyptic number.

51225534 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51225534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57741684).

51225534 is an abundant number, since it is smaller than the sum of its proper divisors (64257834).

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

51225534 is a wasteful number, since it uses less digits than its factorization.

51225534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1933 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51225534 is about 7157.2015480913. The cubic root of 51225534 is about 371.3888247268.

Adding to 51225534 its reverse (43552215), we get a palindrome (94777749).

The spelling of 51225534 in words is "fifty-one million, two hundred twenty-five thousand, five hundred thirty-four".