51523626 has 64 divisors (see below), whose sum is σ = 129300480. Its totient is φ = 13296960.

The previous prime is 51523621. The next prime is 51523627. The reversal of 51523626 is 62632515.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51523593 and 51523602.

It is not an unprimeable number, because it can be changed into a prime (51523621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105555 + ... + 106041.

It is an arithmetic number, because the mean of its divisors is an integer number (2020320).

Almost surely, 2^51523626 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51523626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64650240).

51523626 is an abundant number, since it is smaller than the sum of its proper divisors (77776854).

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

51523626 is a wasteful number, since it uses less digits than its factorization.

51523626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739.

The product of its digits is 10800, while the sum is 30.

The square root of 51523626 is about 7177.9959598763. The cubic root of 51523626 is about 372.1078280320.

Subtracting 51523626 from its reverse (62632515), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 5152 and 3626, that added together give a palindrome (8778).

The spelling of 51523626 in words is "fifty-one million, five hundred twenty-three thousand, six hundred twenty-six".