51855429 has 16 divisors (see below), whose sum is σ = 71781120. Its totient is φ = 33274560.

The previous prime is 51855421. The next prime is 51855431. The reversal of 51855429 is 92455815.

It is not a de Polignac number, because 51855429 - 2³ = 51855421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51855421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5587 + ... + 11615.

It is an arithmetic number, because the mean of its divisors is an integer number (4486320).

Almost surely, 2^51855429 is an apocalyptic number.

It is an amenable number.

51855429 is a deficient number, since it is larger than the sum of its proper divisors (19925691).

51855429 is a wasteful number, since it uses less digits than its factorization.

51855429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140.

The product of its digits is 72000, while the sum is 39.

The square root of 51855429 is about 7201.0713786214. The cubic root of 51855429 is about 372.9048889358.

The spelling of 51855429 in words is "fifty-one million, eight hundred fifty-five thousand, four hundred twenty-nine".