51542259 has 8 divisors (see below), whose sum is σ = 68908752. Its totient is φ = 34268640.

The previous prime is 51542203. The next prime is 51542261. The reversal of 51542259 is 95224515.

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

It is not a de Polignac number, because 51542259 - 2⁷ = 51542131 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51542299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21912 + ... + 24149.

It is an arithmetic number, because the mean of its divisors is an integer number (8613594).

Almost surely, 2^51542259 is an apocalyptic number.

51542259 is a deficient number, since it is larger than the sum of its proper divisors (17366493).

51542259 is a wasteful number, since it uses less digits than its factorization.

51542259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46437.

The product of its digits is 18000, while the sum is 33.

The square root of 51542259 is about 7179.2937674955. The cubic root of 51542259 is about 372.1526789742.

The spelling of 51542259 in words is "fifty-one million, five hundred forty-two thousand, two hundred fifty-nine".