51545427 has 8 divisors (see below), whose sum is σ = 69854160. Its totient is φ = 33800160.

The previous prime is 51545419. The next prime is 51545437. The reversal of 51545427 is 72454515.

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

It is not a de Polignac number, because 51545427 - 2³ = 51545419 is a prime.

It is a super-2 number, since 2×51545427² = 5313862089224658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51545437) 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, 140652 + ... + 141017.

It is an arithmetic number, because the mean of its divisors is an integer number (8731770).

Almost surely, 2^51545427 is an apocalyptic number.

51545427 is a deficient number, since it is larger than the sum of its proper divisors (18308733).

51545427 is a wasteful number, since it uses less digits than its factorization.

51545427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281733.

The product of its digits is 28000, while the sum is 33.

The square root of 51545427 is about 7179.5143986206. The cubic root of 51545427 is about 372.1603034980.

The spelling of 51545427 in words is "fifty-one million, five hundred forty-five thousand, four hundred twenty-seven".