51405429 has 8 divisors (see below), whose sum is σ = 70904160. Its totient is φ = 33088496.

The previous prime is 51405413. The next prime is 51405463. The reversal of 51405429 is 92450415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51405429 - 2⁴ = 51405413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51405396 and 51405405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51405479) 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, 295347 + ... + 295520.

It is an arithmetic number, because the mean of its divisors is an integer number (8863020).

Almost surely, 2^51405429 is an apocalyptic number.

It is an amenable number.

51405429 is a deficient number, since it is larger than the sum of its proper divisors (19498731).

51405429 is a wasteful number, since it uses less digits than its factorization.

51405429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590899.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51405429 is about 7169.7579457050. The cubic root of 51405429 is about 371.8230673801.

The spelling of 51405429 in words is "fifty-one million, four hundred five thousand, four hundred twenty-nine".