51780429 has 12 divisors (see below), whose sum is σ = 78046176. Its totient is φ = 33019272.

The previous prime is 51780409. The next prime is 51780473. The reversal of 51780429 is 92408715.

51780429 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 51780429 - 2⁸ = 51780173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51780393 and 51780402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51780409) 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 11 ways as a sum of consecutive naturals, for example, 124867 + ... + 125280.

It is an arithmetic number, because the mean of its divisors is an integer number (6503848).

Almost surely, 2^51780429 is an apocalyptic number.

It is an amenable number.

51780429 is a deficient number, since it is larger than the sum of its proper divisors (26265747).

51780429 is a wasteful number, since it uses less digits than its factorization.

51780429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250176 (or 250173 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51780429 is about 7195.8619358629. The cubic root of 51780429 is about 372.7250211661.

The spelling of 51780429 in words is "fifty-one million, seven hundred eighty thousand, four hundred twenty-nine".