51020412 has 24 divisors (see below), whose sum is σ = 120556800. Its totient is φ = 16791216.

The previous prime is 51020399. The next prime is 51020413. The reversal of 51020412 is 21402015.

It is a junction number, because it is equal to n+sod(n) for n = 51020391 and 51020400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51020413) 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 7 ways as a sum of consecutive naturals, for example, 25962 + ... + 27857.

It is an arithmetic number, because the mean of its divisors is an integer number (5023200).

Almost surely, 2^51020412 is an apocalyptic number.

It is an amenable number.

51020412 is an abundant number, since it is smaller than the sum of its proper divisors (69536388).

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

51020412 is a wasteful number, since it uses less digits than its factorization.

51020412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53905 (or 53903 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51020412 is about 7142.8574114286. The cubic root of 51020412 is about 370.8924451435.

Adding to 51020412 its reverse (21402015), we get a palindrome (72422427).

The spelling of 51020412 in words is "fifty-one million, twenty thousand, four hundred twelve".