51204531 has 16 divisors (see below), whose sum is σ = 79930368. Its totient is φ = 28545600.

The previous prime is 51204511. The next prime is 51204533. The reversal of 51204531 is 13540215.

51204531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51204531 - 2¹⁷ = 51073459 is a prime.

It is a super-2 number, since 2×51204531² = 5243807989859922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51204498 and 51204507.

It is not an unprimeable number, because it can be changed into a prime (51204533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28875 + ... + 30596.

It is an arithmetic number, because the mean of its divisors is an integer number (4995648).

Almost surely, 2^51204531 is an apocalyptic number.

51204531 is a deficient number, since it is larger than the sum of its proper divisors (28725837).

51204531 is a wasteful number, since it uses less digits than its factorization.

51204531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59522.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51204531 is about 7155.7341342451. The cubic root of 51204531 is about 371.3380600321.

Adding to 51204531 its reverse (13540215), we get a palindrome (64744746).

The spelling of 51204531 in words is "fifty-one million, two hundred four thousand, five hundred thirty-one".